The use of percentile when you have a very non-normal distribution does an elegant transformation of the data to a continuous uniform distribution. Our earlier note was based on statistical differences from the mean of the percentages; I repeated the process but used the mean of the percentiles.

One should be aware that for a specific bacteria, the mean(percentage) may have less then mean(percentile) being significant for some bacteria; while the mean(percentile) may have more than mean(percentile) being significant for other bacteria. In short, directionality is not preserved by the transformation to percentile. This is rarely the case with a normal distribution but does happen with microbiome data. It is a worthwhile exercise to understand this behavior because it is at odds with “common sense” but very true mathematically. Familiarity with the Cauchy distribution may help with the mind shift.

Bottom Line Summary

Using the percentile is slightly superior for prediction. Remember that 16% is the percentage expected from a random predictor. Remember by match, we means how often we get matches to predicted

Method	Average Correct Prediction Match	Winner on a Symptom	Average Taxons
Mean(Percentile)	23.5%	161	126
Mean(Percentage)	22.9%	96	97

The details by symptoms is below.

Symptom Name	Percentile Match	Mean Match
Comorbid: Inflammatory bowel disease	26.69	25.37
Infection: Lyme	26.39	26.26
DePaul University Fatigue Questionnaire : Muscle Pain (i.e., sensations of pain or aching in your muscles. This does not include weakness or pain in other areas such as joints)	26.37	21.69
DePaul University Fatigue Questionnaire : Easily irritated	26.30	21.03
Neurological-Vision: Blurred Vision	26.25	25.09
DePaul University Fatigue Questionnaire : Tense muscles	26.05	26.27
Neurological: Difficulty reading	25.98	23.59
DePaul University Fatigue Questionnaire : Weight change	25.85	25.79
Immune Manifestations: Hair loss	25.76	22.25
DePaul University Fatigue Questionnaire : Tingling feeling	25.75	24.20
Post-exertional malaise: Next-day soreness after everyday activities	25.74	23.13
Neurological-Vision: inability to focus eye/vision	25.74	22.38
DePaul University Fatigue Questionnaire : Muscle weakness	25.66	22.68
Comorbid: Mold Sensitivity / Exposure	25.62	26.26
Immune: Sensitivity to smell/food/medication/chemicals	25.62	21.61
Neuroendocrine Manifestations: intolerance of extremes of heat and cold	25.56	21.52
General: Heavy feeling in arms and legs	25.53	23.32
DePaul University Fatigue Questionnaire : Blurred Vision	25.53	22.49
DePaul University Fatigue Questionnaire : Difficulty comprehending Information	25.50	22.24
General: Myalgia (pain)	25.49	24.54
DePaul University Fatigue Questionnaire : Pain in Multiple Joints without Swelling or Redness	25.44	22.90
DePaul University Fatigue Questionnaire : New trouble with math	25.44	25.87
Neurological: Executive Decision Making (Difficulty making)	25.40	23.39
DePaul University Fatigue Questionnaire : Chilled or shivery	25.38	25.74
Neurological-Sleep: Inability for deep (delta) sleep	25.32	23.24
Neurological: Difficulty processing information (Understanding)	25.29	23.57
Post-exertional malaise: Rapid muscular fatigability,	25.28	21.44
Other: Sensitivity to mold	25.26	24.17
Comorbid: Small intestinal bacterial overgrowth (SIBO)	25.25	20.96
DePaul University Fatigue Questionnaire : Difficulty falling asleep	25.17	21.08
Pain: Joint pain	25.17	23.25
Immune Manifestations: Inflammation of skin, eyes or joints	25.14	23.55
DePaul University Fatigue Questionnaire : Difficulty following things	25.13	22.84
Virus: Epstein-Barr virus	25.09	23.30
DePaul University Fatigue Questionnaire : Temperature lower than normal	25.07	22.82
Immune Manifestations: Chronic Flatus / Flatulence / gas	25.00	21.39
Post-exertional malaise: Mentally tired after the slightest effort	24.93	22.40
DePaul University Fatigue Questionnaire : Sensitivity to Alcohol	24.86	22.52
Neurological: Dysautonomia	24.83	22.95
Neuroendocrine Manifestations: Muscle weakness	24.80	22.64
Neurocognitive: Difficulty expressing thoughts	24.75	20.27
Onset: 2000-2010	24.72	21.89
DePaul University Fatigue Questionnaire : Upset stomach	24.70	24.95
Immune Manifestations: Inflammation (General)	24.60	21.97
Comorbid-Mouth: Bruxism – Jaw cleanching / Teeth grinding	24.59	21.65
DePaul University Fatigue Questionnaire : Chemical sensitivity	24.58	25.19
DePaul University Fatigue Questionnaire : Difficulty reasoning things out	24.57	22.94
DePaul University Fatigue Questionnaire : Confusion/disorientation	24.56	25.87
DePaul University Fatigue Questionnaire : Frequently loose train of thought	24.55	23.09
Post-exertional malaise: Difficulty reading after mild physical or mental activity	24.54	20.25
DePaul University Fatigue Questionnaire : Trouble expressing thoughts	24.52	23.70
DePaul University Fatigue Questionnaire : Shortness of breath	24.49	22.88
DePaul University Fatigue Questionnaire : Abnormal sensitivity to light	24.45	24.32
Post-exertional malaise: Physically tired after minimum exercise	24.44	21.70
Official Diagnosis: Chronic Fatigue Syndrome (CFS/ME)	24.44	20.20
Neurological-Sleep: Sleep Apnea	24.43	30.42
Neurocognitive: Absent-mindedness or forgetfulness	24.42	21.07
Neuroendocrine Manifestations: Poor gut motility	24.42	20.04
DePaul University Fatigue Questionnaire : Slowness of thought	24.41	23.01
Gender: Female	24.41	20.35
Post-exertional malaise: Rapid cognitive fatigability,	24.40	21.05
Neurological: Cognitive/Sensory Overload	24.39	22.84
Post-exertional malaise: Inappropriate loss of physical and mental stamina,	24.39	20.33
Sleep: Problems falling asleep	24.37	19.75
DePaul University Fatigue Questionnaire : Eye pain	24.35	22.92
DePaul University Fatigue Questionnaire : Unrefreshing Sleep, that is waking up feeling tired	24.33	20.49
Neurocognitive: Unable to focus vision and/or attention	24.32	24.34
Immune Manifestations: Mucus in the stool	24.32	23.08
Immune Manifestations: Constipation	24.32	19.42
Physical: Work-Sitting	24.31	20.96
DePaul University Fatigue Questionnaire : Mood swings	24.30	22.58
Neurological-Sleep: Insomnia	24.27	20.91
Post-exertional malaise: Muscle fatigue after mild physical activity	24.26	21.75
DePaul University Fatigue Questionnaire : Ringing in the Ears	24.25	22.34
Immune Manifestations: new food sensitivities	24.25	21.28
Neuroendocrine Manifestations: cold extremities	24.24	19.68
Comorbid-Mouth: Dry Mouth	24.24	24.13
Neurocognitive: Feeling disoriented	24.24	24.51
Neuroendocrine: Alcohol intolerance	24.24	20.91
DePaul University Fatigue Questionnaire : Does physical activity make you feel worse	24.24	21.37
DePaul University Fatigue Questionnaire : Difficulty finding the right word	24.23	20.46
Neurological: Neuropathy	24.20	24.34
Comorbid: Migraine	24.20	24.54
Neurological: emotional overload	24.20	24.17
Age: 40-50	24.20	18.92
Immune Manifestations: Abdominal Pain	24.19	21.59
Neuroendocrine Manifestations: Rapid muscular fatiguability	24.13	22.24
Post-exertional malaise: Physically drained or sick after mild activity	24.06	22.15
Physical: Amalgam fillings	24.06	22.43
Neuroendocrine Manifestations: marked weight change	24.05	24.83
Pain: Pain or aching in muscles	24.05	21.54
Autonomic Manifestations: Orthostatic intolerance	24.04	23.20
Neuroendocrine: Lost or gained weight without trying	24.02	22.19
Neurological: Impairment of concentration	24.01	21.29
Neuroendocrine: Feeling hot or cold for no reason	24.00	22.53
Onset: Sudden	24.00	21.03
DePaul University Fatigue Questionnaire : Absent-mindedness	23.99	23.34
Autonomic: Shortness of breath	23.96	24.04
Sleep: Unrefreshed sleep	23.96	18.84
Neurological: Short-term memory issues	23.96	20.71
Autonomic Manifestations: irritable bowel syndrome	23.94	22.18
Physical: Steps Per Day 4000-8000	23.93	21.26
Autonomic Manifestations: light-headedness	23.89	23.75
Physical: Steps Per Day 2000-4000	23.89	22.21
Physical: Good Air Quality	23.89	24.27
Autonomic Manifestations: urinary frequency dysfunction	23.89	25.32
DePaul University Fatigue Questionnaire : Need to have to focus on one thing at a time	23.89	22.37
Official Diagnosis: Attention deficit hyperactivity disorder (ADHD)	23.88	25.24
Neurological-Audio: hypersensitivity to noise	23.88	22.04
Post-exertional malaise: General	23.87	20.19
Post-exertional malaise: Post-exertional malaise	23.86	21.48
DePaul University Fatigue Questionnaire : Difficulty staying asleep	23.83	22.37
Neuroendocrine Manifestations: Dry Eye (Sicca or Sjogren Syndrome)	23.82	21.35
DePaul University Fatigue Questionnaire : Impaired Memory & concentration	23.81	22.76
DePaul University Fatigue Questionnaire : Fatigue	23.81	21.21
Neurological-Vision: photophobia (Light Sensitivity)	23.81	25.02
Comorbid: Restless Leg	23.80	25.29
General: Fatigue	23.77	18.39
Neurocognitive: Brain Fog	23.75	19.88
Comorbid: Multiple Chemical Sensitivity	23.75	23.15
DePaul University Fatigue Questionnaire : Difficulty recalling information	23.75	21.10
Immune Manifestations: medication sensitivities.	23.75	21.01
Comorbid: Histamine or Mast Cell issues	23.74	20.41
Condition: Acne	23.74	21.63
Neurocognitive: Difficulty understanding things	23.73	20.84
Autonomic Manifestations: Postural orthostatic tachycardia syndrome (POTS)	23.73	22.83
Pain: Sensitivity to pain	23.72	26.02
Joint: Tenderness	23.72	24.26
Other: Sensitivity to vibrations	23.68	25.97
DePaul University Fatigue Questionnaire : Frequently get words or numbers in the wrong order	23.67	26.05
Neuroendocrine: Cold limbs (e.g. arms, legs hands)	23.67	21.42
Post-exertional malaise: Worsening of symptoms after mild mental activity	23.67	22.24
Immune Manifestations: Bloating	23.66	20.51
General: Headaches	23.66	22.25
DePaul University Fatigue Questionnaire : Difficulty retaining information	23.63	23.04
Autonomic: Heart rate increase after standing	23.60	20.51
Post-exertional malaise: Worsening of symptoms after mild physical activity	23.58	21.27
DePaul University Fatigue Questionnaire : Forgetting what you are trying to say	23.56	22.10
DePaul University Fatigue Questionnaire : Post-exertional malaise, feeling worse after doing activities that require either physical or mental exertion	23.56	20.52
Neuroendocrine Manifestations: worsening of symptoms with stress.	23.54	19.94
Condition: ME/CFS with IBS	23.53	21.15
Comorbid: Constipation and Diarrohea (not explosions)	23.51	21.70
Neurocognitive: Slowness of thought	23.51	21.35
Condition: Post-Traumatic Stress Disorder	23.49	27.09
Comorbid-Mouth: TMJ / Dysfunction of the temporomandibular joint syndrome	23.48	22.93
Autonomic: Dizziness or fainting	23.47	25.31
Age: 30-40	23.46	22.59
DePaul University Fatigue Questionnaire : Slow to react	23.44	23.99
DePaul University Fatigue Questionnaire : Concern with driving	23.43	25.82
Immune Manifestations: recurrent flu-like symptoms	23.43	22.86
Comorbid: Sleep Apnea Diagnosis	23.41	27.83
Neurological-Audio: Tinnitus (ringing in ear)	23.41	20.98
Autonomic Manifestations: palpitations	23.41	20.80
Immune Manifestations: Thick blood / Hypercoagulation	23.38	25.82
Neurocognitive: Problems remembering things	23.35	21.13
DePaul University Fatigue Questionnaire : Dizziness	23.35	24.74
Immune Manifestations: general malaise	23.33	19.84
Sleep: Problems staying asleep	23.33	20.03
Physical: Long term (chronic) stress	23.30	22.22
Immune Manifestations: tender lymph nodes	23.28	24.97
Sleep: Daytime drowsiness	23.27	21.07
DePaul University Fatigue Questionnaire : Abdomen pain	23.26	23.29
Neurocognitive: Can only focus on one thing at a time	23.25	21.20
Pain: Aching of the eyes or behind the eyes	23.23	24.86
DePaul University Fatigue Questionnaire : Depression	23.20	25.30
DePaul University Fatigue Questionnaire : Anxiety/tension	23.17	21.78
Immune Manifestations: Diarrhea	23.17	22.26
Neurocognitive: Difficulty paying attention for a long period of time	23.15	19.57
Official Diagnosis: Fibromyalgia	23.11	25.73
Physical: Breastfed	23.10	22.23
Official Diagnosis: Autism	23.09	22.72
Official Diagnosis: Irritable Bowel Syndrome	23.07	19.64
General: Anhedonia (inability to feel pleasure)	23.06	25.13
Age: 60-70	23.06	25.48
Neurological: High degree of Empathy before onset	23.03	25.21
Blood Type: O Positive	23.01	22.58
Physical: Steps Per Day < 2000	23.00	21.24
Condition: ME/CFS without IBS	22.99	21.23
DePaul University Fatigue Questionnaire : Headaches	22.99	22.21
Onset: Gradual	22.93	20.90
Immune Manifestations: Alcohol Intolerant	22.93	21.25
DePaul University Fatigue Questionnaire : Nausea	22.93	25.28
Immune: Viral infections with prolonged recovery periods	22.92	23.79
Neurological: Word-finding problems	22.91	21.30
DePaul University Fatigue Questionnaire : Allergies	22.91	21.39
Neuroendocrine Manifestations: Air Hunger	22.90	23.25
Autonomic Manifestations: Cortisol disorders or irregularity	22.87	26.22
Official Diagnosis: Allergic Rhinitis (Hay Fever)	22.85	20.06
Comorbid: Methylation issues (MTHFR)	22.85	24.23
Official Diagnosis: Gastroesophageal reflux disease (GERD)	22.76	24.27
Joint: Stiffness and swelling	22.75	25.95
General: Depression	22.73	22.15
Official Diagnosis: Mast Cell Dysfunction	22.71	23.61
Gender: Male	22.71	18.29
Age: 50-60	22.66	21.94
Autonomic: Inability to tolerate an upright position	22.63	25.39
DePaul University Fatigue Questionnaire : Racing heart	22.59	24.64
Condition: Non-Celiac Gluten Sensitivity	22.59	23.05
Comorbid: High Anxiety	22.56	22.02
DePaul University Fatigue Questionnaire : Hot or Cold spells	22.49	22.72
Sleep: Waking up early in the morning (e.g. 3 AM)	22.45	21.76
Physical: Northern European	22.44	21.58
Onset: less than 04 years since onset	22.43	22.47
Immune: Recurrent Sore throat	22.43	22.38
Official Diagnosis: COVID19 (Long Hauler)	22.41	20.18
General: Sinus issues with headaches	22.41	21.48
Blood Type: A Positive	22.38	21.61
DePaul University Fatigue Questionnaire : Sore Throat	22.37	25.17
DePaul University Fatigue Questionnaire : Walking up early in the morning (e.g. 3AM)	22.37	21.03
Immune: Tender / sore lymph nodes	22.37	24.62
DePaul University Fatigue Questionnaire : Need to nap during each day	22.37	21.23
Age: 20-30	22.27	19.37
DePaul University Fatigue Questionnaire : Feel unsteady on feet	22.26	23.61
Autonomic: Irregular heartbeats	22.25	23.87
Onset: 2010-2020	22.25	20.01
Physical: Tonsils removed	22.22	24.24
Autonomic: Nausea	22.17	22.59
Onset: less than 32 years since onset	22.15	26.14
Official Diagnosis: Autoimmune Disease	22.15	23.09
Physical: Pets	22.14	22.14
Condition: Generalized anxiety disorder	22.13	27.21
Comorbid: Mood Swings	22.13	25.38
DePaul University Fatigue Questionnaire : Feeling like you have a temperature	22.09	25.22
Comorbid: Hypothyroidism	22.07	22.74
Neurological-Sleep: Chaotic diurnal sleep rhythms (Erratic Sleep)	22.03	25.54
Autonomic: Ocassional Tachycardia (Rapid heart beat)	22.02	22.86
Comorbid: Fibromyalgia	22.01	24.58
Immune: Chronic Sinusitis	21.95	22.83
Official Diagnosis: Hypercholesterolemia (High Cholesterol)	21.94	28.51
Sleep: Need to nap daily	21.92	22.57
Neurological: Joint hypermobility	21.88	22.12
Autonomic Manifestations: exertional dyspnea	21.79	26.96
Pain: Myofascial pain	21.75	25.77
Autonomic Manifestations: nausea	21.71	22.62
Neurological-Sleep: Night Sweats	21.70	26.96
Immune: Flu-like symptoms	21.66	21.85
Physical: Organic Diet	21.62	23.80
Neuroendocrine: Temperature fluctuations throughout the day	21.60	25.29
Neurological: Myoclonic jerks or seizures	21.49	22.89
Neuroendocrine Manifestations: subnormal body temperature	21.43	24.68
DePaul University Fatigue Questionnaire : Night sweats	21.33	27.05
Neurological-Sleep: Vivid Dreams/Nightmares	21.31	26.39
Neuroendocrine Manifestations: sweating episodes	20.99	23.42
Neurological: Confusion	20.91	24.86
Comorbid-Mouth: Gingivits / Gum Disease	20.83	27.31
Neuroendocrine: Feeling like you have a high temperature	20.81	25.65
Autonomic Manifestations: bladder dysfunction	20.59	25.96
Onset: less than 02 years since onset	20.53	23.60
Onset: less than 16 years since onset	20.41	21.35
Neuroendocrine Manifestations: Painful menstrual periods	20.21	22.90
DePaul University Fatigue Questionnaire : Rash	20.12	23.90
Neuroendocrine Manifestations: Paraesthesia (tingling burning of skin)	19.75	22.42
Official Diagnosis: Depression	19.52	24.34
Physical: Eastern European	19.42	21.21
Neurological: Disorientation	18.84	27.99
Neuroendocrine Manifestations: Excessive adrenaline	18.16	25.52
Neurological: Seasonal Affective Disorder (SAD)	16.89	27.39

Looking at the bacteria taxons identified by each, we also see difference

Symptom Name	Percentile Taxons	Mean Taxons
Age: 20-30	131	100
Age: 30-40	245	61
Age: 40-50	202	138
Age: 50-60	112	91
Age: 60-70	45	124
Autonomic Manifestations: bladder dysfunction	21	125
Autonomic Manifestations: Cortisol disorders or irregularity	51	126
Autonomic Manifestations: exertional dyspnea	39	113
Autonomic Manifestations: irritable bowel syndrome	195	94
Autonomic Manifestations: light-headedness	110	121
Autonomic Manifestations: nausea	99	105
Autonomic Manifestations: Orthostatic intolerance	126	128
Autonomic Manifestations: palpitations	155	122
Autonomic Manifestations: Postural orthostatic tachycardia syndrome (POTS)	139	145
Autonomic Manifestations: urinary frequency dysfunction	98	97
Autonomic: Dizziness or fainting	93	132
Autonomic: Heart rate increase after standing	175	155
Autonomic: Inability to tolerate an upright position	68	115
Autonomic: Irregular heartbeats	63	114
Autonomic: Nausea	73	91
Autonomic: Ocassional Tachycardia (Rapid heart beat)	134	100
Autonomic: Shortness of breath	155	107
Blood Type: A Positive	93	97
Blood Type: O Positive	111	106
Comorbid-Mouth: Bruxism – Jaw cleanching / Teeth grinding	165	97
Comorbid-Mouth: Dry Mouth	132	121
Comorbid-Mouth: Gingivits / Gum Disease	27	105
Comorbid-Mouth: TMJ / Dysfunction of the temporomandibular joint syndrome	71	106
Comorbid: Constipation and Diarrohea (not explosions)	119	93
Comorbid: Fibromyalgia	80	80
Comorbid: High Anxiety	167	97
Comorbid: Histamine or Mast Cell issues	226	82
Comorbid: Hypothyroidism	116	103
Comorbid: Inflammatory bowel disease	86	83
Comorbid: Methylation issues (MTHFR)	106	99
Comorbid: Migraine	93	98
Comorbid: Mold Sensitivity / Exposure	114	79
Comorbid: Mood Swings	123	72
Comorbid: Multiple Chemical Sensitivity	85	68
Comorbid: Restless Leg	100	77
Comorbid: Sleep Apnea Diagnosis	69	114
Comorbid: Small intestinal bacterial overgrowth (SIBO)	149	100
Condition: Acne	128	75
Condition: Generalized anxiety disorder	24	114
Condition: ME/CFS with IBS	205	100
Condition: ME/CFS without IBS	161	87
Condition: Non-Celiac Gluten Sensitivity	108	103
Condition: Post-Traumatic Stress Disorder	84	80
DePaul University Fatigue Questionnaire : Abdomen pain	104	84
DePaul University Fatigue Questionnaire : Abnormal sensitivity to light	138	128
DePaul University Fatigue Questionnaire : Absent-mindedness	156	96
DePaul University Fatigue Questionnaire : Allergies	159	99
DePaul University Fatigue Questionnaire : Anxiety/tension	174	113
DePaul University Fatigue Questionnaire : Blurred Vision	114	96
DePaul University Fatigue Questionnaire : Chemical sensitivity	83	76
DePaul University Fatigue Questionnaire : Chilled or shivery	69	104
DePaul University Fatigue Questionnaire : Concern with driving	71	91
DePaul University Fatigue Questionnaire : Confusion/disorientation	102	84
DePaul University Fatigue Questionnaire : Depression	123	90
DePaul University Fatigue Questionnaire : Difficulty comprehending Information	173	87
DePaul University Fatigue Questionnaire : Difficulty falling asleep	152	81
DePaul University Fatigue Questionnaire : Difficulty finding the right word	205	95
DePaul University Fatigue Questionnaire : Difficulty following things	131	116
DePaul University Fatigue Questionnaire : Difficulty reasoning things out	123	102
DePaul University Fatigue Questionnaire : Difficulty recalling information	182	93
DePaul University Fatigue Questionnaire : Difficulty retaining information	150	96
DePaul University Fatigue Questionnaire : Difficulty staying asleep	172	128
DePaul University Fatigue Questionnaire : Dizziness	102	109
DePaul University Fatigue Questionnaire : Does physical activity make you feel worse	201	99
DePaul University Fatigue Questionnaire : Easily irritated	188	71
DePaul University Fatigue Questionnaire : Eye pain	80	113
DePaul University Fatigue Questionnaire : Fatigue	248	84
DePaul University Fatigue Questionnaire : Feel unsteady on feet	31	111
DePaul University Fatigue Questionnaire : Feeling like you have a temperature	44	92
DePaul University Fatigue Questionnaire : Forgetting what you are trying to say	169	83
DePaul University Fatigue Questionnaire : Frequently get words or numbers in the wrong order	67	108
DePaul University Fatigue Questionnaire : Frequently loose train of thought	141	85
DePaul University Fatigue Questionnaire : Headaches	116	101
DePaul University Fatigue Questionnaire : Hot or Cold spells	112	94
DePaul University Fatigue Questionnaire : Impaired Memory & concentration	204	87
DePaul University Fatigue Questionnaire : Mood swings	98	85
DePaul University Fatigue Questionnaire : Muscle Pain (i.e., sensations of pain or aching in your muscles. This does not include weakness or pain in other areas such as joints)	161	80
DePaul University Fatigue Questionnaire : Muscle weakness	176	99
DePaul University Fatigue Questionnaire : Nausea	83	114
DePaul University Fatigue Questionnaire : Need to have to focus on one thing at a time	178	77
DePaul University Fatigue Questionnaire : Need to nap during each day	110	109
DePaul University Fatigue Questionnaire : New trouble with math	17	86
DePaul University Fatigue Questionnaire : Night sweats	59	121
DePaul University Fatigue Questionnaire : Pain in Multiple Joints without Swelling or Redness	108	91
DePaul University Fatigue Questionnaire : Post-exertional malaise, feeling worse after doing activities that require either physical or mental exertion	217	80
DePaul University Fatigue Questionnaire : Racing heart	109	102
DePaul University Fatigue Questionnaire : Rash	43	68
DePaul University Fatigue Questionnaire : Ringing in the Ears	186	105
DePaul University Fatigue Questionnaire : Sensitivity to Alcohol	117	104
DePaul University Fatigue Questionnaire : Shortness of breath	109	100
DePaul University Fatigue Questionnaire : Slow to react	114	94
DePaul University Fatigue Questionnaire : Slowness of thought	170	95
DePaul University Fatigue Questionnaire : Sore Throat	82	93
DePaul University Fatigue Questionnaire : Temperature lower than normal	79	112
DePaul University Fatigue Questionnaire : Tense muscles	129	93
DePaul University Fatigue Questionnaire : Tingling feeling	127	94
DePaul University Fatigue Questionnaire : Trouble expressing thoughts	128	101
DePaul University Fatigue Questionnaire : Unrefreshing Sleep, that is waking up feeling tired	233	66
DePaul University Fatigue Questionnaire : Upset stomach	121	90
DePaul University Fatigue Questionnaire : Walking up early in the morning (e.g. 3AM)	130	94
DePaul University Fatigue Questionnaire : Weight change	96	85
Gender: Female	250	100
Gender: Male	267	81
General: Anhedonia (inability to feel pleasure)	40	112
General: Depression	148	116
General: Fatigue	299	63
General: Headaches	151	82
General: Heavy feeling in arms and legs	149	87
General: Myalgia (pain)	129	97
General: Sinus issues with headaches	72	86
Immune Manifestations: Abdominal Pain	159	90
Immune Manifestations: Alcohol Intolerant	138	96
Immune Manifestations: Bloating	254	84
Immune Manifestations: Chronic Flatus / Flatulence / gas	144	113
Immune Manifestations: Constipation	218	91
Immune Manifestations: Diarrhea	133	82
Immune Manifestations: general malaise	206	117
Immune Manifestations: Hair loss	149	90
Immune Manifestations: Inflammation (General)	186	89
Immune Manifestations: Inflammation of skin, eyes or joints	150	106
Immune Manifestations: medication sensitivities.	78	101
Immune Manifestations: Mucus in the stool	101	88
Immune Manifestations: new food sensitivities	131	94
Immune Manifestations: recurrent flu-like symptoms	102	119
Immune Manifestations: tender lymph nodes	80	138
Immune Manifestations: Thick blood / Hypercoagulation	44	114
Immune: Chronic Sinusitis	93	91
Immune: Flu-like symptoms	88	99
Immune: Recurrent Sore throat	118	98
Immune: Sensitivity to smell/food/medication/chemicals	149	79
Immune: Tender / sore lymph nodes	61	138
Immune: Viral infections with prolonged recovery periods	76	139
Infection: Lyme	57	126
Joint: Stiffness and swelling	71	117
Joint: Tenderness	73	94
Neurocognitive: Absent-mindedness or forgetfulness	195	85
Neurocognitive: Brain Fog	301	60
Neurocognitive: Can only focus on one thing at a time	218	66
Neurocognitive: Difficulty expressing thoughts	184	67
Neurocognitive: Difficulty paying attention for a long period of time	230	71
Neurocognitive: Difficulty understanding things	171	77
Neurocognitive: Feeling disoriented	127	86
Neurocognitive: Problems remembering things	213	94
Neurocognitive: Slowness of thought	196	84
Neurocognitive: Unable to focus vision and/or attention	168	108
Neuroendocrine Manifestations: Air Hunger	110	93
Neuroendocrine Manifestations: cold extremities	191	81
Neuroendocrine Manifestations: Dry Eye (Sicca or Sjogren Syndrome)	129	110
Neuroendocrine Manifestations: Excessive adrenaline	33	90
Neuroendocrine Manifestations: intolerance of extremes of heat and cold	202	57
Neuroendocrine Manifestations: marked weight change	51	113
Neuroendocrine Manifestations: Muscle weakness	142	123
Neuroendocrine Manifestations: Painful menstrual periods	27	81
Neuroendocrine Manifestations: Paraesthesia (tingling burning of skin)	45	112
Neuroendocrine Manifestations: Poor gut motility	198	91
Neuroendocrine Manifestations: Rapid muscular fatiguability	142	105
Neuroendocrine Manifestations: subnormal body temperature	51	145
Neuroendocrine Manifestations: sweating episodes	81	120
Neuroendocrine Manifestations: worsening of symptoms with stress.	235	86
Neuroendocrine: Alcohol intolerance	129	91
Neuroendocrine: Cold limbs (e.g. arms, legs hands)	166	84
Neuroendocrine: Feeling hot or cold for no reason	138	82
Neuroendocrine: Feeling like you have a high temperature	22	87
Neuroendocrine: Lost or gained weight without trying	116	96
Neuroendocrine: Temperature fluctuations throughout the day	37	79
Neurological-Audio: hypersensitivity to noise	203	85
Neurological-Audio: Tinnitus (ringing in ear)	227	115
Neurological-Sleep: Chaotic diurnal sleep rhythms (Erratic Sleep)	63	122
Neurological-Sleep: Inability for deep (delta) sleep	122	85
Neurological-Sleep: Insomnia	191	98
Neurological-Sleep: Night Sweats	86	106
Neurological-Sleep: Sleep Apnea	68	115
Neurological-Sleep: Vivid Dreams/Nightmares	73	107
Neurological-Vision: Blurred Vision	123	83
Neurological-Vision: inability to focus eye/vision	93	105
Neurological-Vision: photophobia (Light Sensitivity)	128	101
Neurological: Cognitive/Sensory Overload	172	80
Neurological: Confusion	63	72
Neurological: Difficulty processing information (Understanding)	156	91
Neurological: Difficulty reading	130	86
Neurological: Disorientation	41	90
Neurological: Dysautonomia	151	117
Neurological: emotional overload	132	82
Neurological: Executive Decision Making (Difficulty making)	139	76
Neurological: High degree of Empathy before onset	68	78
Neurological: Impairment of concentration	182	88
Neurological: Joint hypermobility	62	66
Neurological: Myoclonic jerks or seizures	20	100
Neurological: Neuropathy	67	96
Neurological: Seasonal Affective Disorder (SAD)	16	88
Neurological: Short-term memory issues	170	101
Neurological: Word-finding problems	193	80
Official Diagnosis: Allergic Rhinitis (Hay Fever)	118	62
Official Diagnosis: Attention deficit hyperactivity disorder (ADHD)	73	118
Official Diagnosis: Autism	112	115
Official Diagnosis: Autoimmune Disease	76	119
Official Diagnosis: Chronic Fatigue Syndrome (CFS/ME)	263	136
Official Diagnosis: COVID19 (Long Hauler)	249	150
Official Diagnosis: Depression	56	137
Official Diagnosis: Fibromyalgia	48	103
Official Diagnosis: Gastroesophageal reflux disease (GERD)	82	97
Official Diagnosis: Hypercholesterolemia (High Cholesterol)	23	104
Official Diagnosis: Irritable Bowel Syndrome	173	96
Official Diagnosis: Mast Cell Dysfunction	59	108
Onset: 2000-2010	96	99
Onset: 2010-2020	154	106
Onset: Gradual	108	89
Onset: less than 02 years since onset	66	120
Onset: less than 04 years since onset	84	82
Onset: less than 16 years since onset	57	92
Onset: less than 32 years since onset	50	108
Onset: Sudden	118	86
Other: Sensitivity to mold	109	82
Other: Sensitivity to vibrations	28	114
Pain: Aching of the eyes or behind the eyes	91	94
Pain: Joint pain	140	94
Pain: Myofascial pain	52	75
Pain: Pain or aching in muscles	145	98
Pain: Sensitivity to pain	80	106
Physical: Amalgam fillings	98	133
Physical: Breastfed	112	100
Physical: Eastern European	39	94
Physical: Good Air Quality	48	111
Physical: Long term (chronic) stress	167	150
Physical: Northern European	184	120
Physical: Organic Diet	28	92
Physical: Pets	124	81
Physical: Steps Per Day < 2000	133	115
Physical: Steps Per Day 2000-4000	117	111
Physical: Steps Per Day 4000-8000	102	107
Physical: Tonsils removed	72	122
Physical: Work-Sitting	183	79
Post-exertional malaise: Difficulty reading after mild physical or mental activity	158	95
Post-exertional malaise: General	197	82
Post-exertional malaise: Inappropriate loss of physical and mental stamina,	181	90
Post-exertional malaise: Mentally tired after the slightest effort	144	79
Post-exertional malaise: Muscle fatigue after mild physical activity	176	90
Post-exertional malaise: Next-day soreness after everyday activities	140	90
Post-exertional malaise: Physically drained or sick after mild activity	173	89
Post-exertional malaise: Physically tired after minimum exercise	193	80
Post-exertional malaise: Post-exertional malaise	198	93
Post-exertional malaise: Rapid cognitive fatigability,	158	86
Post-exertional malaise: Rapid muscular fatigability,	146	105
Post-exertional malaise: Worsening of symptoms after mild mental activity	155	68
Post-exertional malaise: Worsening of symptoms after mild physical activity	215	100
Sleep: Daytime drowsiness	175	71
Sleep: Need to nap daily	105	88
Sleep: Problems falling asleep	181	93
Sleep: Problems staying asleep	210	73
Sleep: Unrefreshed sleep	276	62
Sleep: Waking up early in the morning (e.g. 3 AM)	172	89
Virus: Epstein-Barr virus	123	89

Spot checking a few, we find that more bacteria to filter by seems to result in a higher percentage of matches. Consider Females:

• Measure: Using Percentile \ Using Mean
• Taxons: Gender: Female 250 \ 100
• Matches: Gender: Female 24.41% \ 20.35%

Bottom Line

The purpose of this post is to compare too methodologies. Neither appears absolutely superior to the other. For forecasting, it may be best to do each and takes the superior one. It is intended to show an alternative approach to this type of data.

The Percentile Advantage

If the lab being used provides percentiles over a diverse large population, you may not need a control group. The mean percentile of the population is 50 and the standard deviation of the population is 28.87 because we are dealing with a uniform distribution. We can then proceed to compute the mean of the percentiles of those with a condition and then compute the standard error resulting in a z-score.

The z-score will likely be a little lower than a perfect experiment because the large population will likely contain some with the condition being examined. Z-scores will actually be conservative, and the cost significantly less.

 I’ve been suffering from myalgic encephalomyelitis for over a year now (long covid or not, I don’t know), in an almost severe state for the last 6 months.

I recently had a Biomesight test and a long covid friend told me that you might be able to help me interpret my results.

Overview

Our usual first look visuals shows the dysbiosis and the typical pattern for ME/CFS and long COVID – an over abundance of bacteria at a low levels.

The forecast symptoms matches ME/CFS and Long COVID patterns

1.  83.3 % match for Neurological-Sleep: Inability for deep (delta) sleep on 42 taxa
2.  76.3 % match for Immune Manifestations: Hair loss on 38 taxa
3.  76.3 % match for Immune Manifestations: Mucus in the stool on 93 taxa
4.  75.2 % match for Neurocognitive: Problems remembering things on 141 taxa
5.  74.7 % match for Neurocognitive: Absent-mindedness or forgetfulness on 162 taxa
6.  74.6 % match for Neurological: Short-term memory issues on 71 taxa
7.  74.5 % match for Neuroendocrine Manifestations: cold extremities on 55 taxa
8.  74.3 % match for Neurocognitive: Can only focus on one thing at a time on 101 taxa

Drilling down into Health Predictors we see a rather high number, 13 items flagged. Looking at Dr. Jason Hawrelak Recommendations , we are at the 9%ile, not good.

Looking at Bacteria deemed unhealthy, we see the following very significant items.

• Bilophila genus 100%ile High Level Cause Brain Fog(Cognitive impairment) Citation

Addressing the problem

The process is simple, just click this buttom

Then use the filtering button to view different suggestions. The highest priority was 1000, lowest -765 so we will look to take items over 500 and aggressively avoid items below -350. The dosages come from this summary page that links to studies, dosages should be reviewed by your MD before starting.

• Vitamins (All of these are typical for ME/CFS and shown to help in studies).
  • Vitamin B-12 – 10   mg/day
  • Vitamin B1,thiamine hydrochloride – 1800   mg/day
  • Vitamin B6,pyridoxine hydrochloride – 50 mg/day
  • vitamin B7, biotin –300 mg/day
  • vitamin B3,niacin – 1000 mg/day
  • Vitamin C (ascorbic acid) – 3000   mg/d
• Supplements (take at least one of these each week – see above link for suggested dosages)
  • melatonin supplement
  • Hesperidin (polyphenol)
  • Arbutin (polyphenol)
  • diosmin (polyphenol)
  • luteolin (flavonoid)
• Herbs and Foods
  • garlic (allium sativum)
  • momordia charantia(bitter melon, karela, balsam pear, or bitter gourd)
  • Caffeine
  • whole-grain barley
  • sucralose
• Probiotics
  • lactobacillus kefiri (NOT KEFIR) — available in Italy only 🙁
  • Below the 500 threshold but should have some impact
    • lactobacillus reuteri (probiotics)
    • bifidobacterium infantis,(probiotics)
• Antibiotics (only picked those that have been used with ME/CFS by specialists). If done, they should be rotated and pulse (i.e. 7-10 days on one, 3 weeks off; then a different one is used). See Dr. C. Jadin’s approach.

The avoid list is often ignored by people. They should not be. These items feed the undesired shifts.

• Diet Style AVOIDS
  • ketogenic diet
  • hypocaloric hyperproteic diet
  • high saturated milk fat diet
  • fasting
• Foods AVOIDS
  • pectin
  • apple
  • Pulses
  • Pumpkin
  • pea (fiber, protein)
  • nuts
• Herbs AVOIDS
  • Slippery Elm
  • berberine
  • camellia
• Supplements AVOIDS
  • bile (acid/salts)
  • arabinogalactan (prebiotic)
  • Human milk oligosaccharides (prebiotic, Holigos, Stachyose)
  • resistant maltodextrin
  • xylan (prebiotic)
  • resistant starch
  • non-starch polysaccharides
  • bacillus licheniformis,(probiotics)
  • galactose (milk sugar)

Try for 8 weeks, then retest

While waiting for test results, keep to the suggestions.

• As is common with ME/CFS people, you may want to be done with the disease ASAP so much you toss yourself into it. I have been there and done that. Taking everything at once risk major herx reaction. The key is rotate and pulse. Avoid substances that cause herx that is longer than 6 hours — you are not ready for those, we need to take the longer path instead of trying to climb a cliff face.
• Try this pattern:
  • Take the probiotics, herbs and non-vitamin supplements into groups.
    • Week 1: take the probiotic for a week (#1 in priority)
    • Week 2: take one herb for a week (#1 in priority)
    • Week 3: one supplement for a week (#1 in priority)
    • Then go back to probiotic BUT take a different one (i.e. #2 in priority), same pattern for other things
  • After 8-12 weeks do a retest and see where suggestions have shifted
  • The goal is to destabilize a stable dysbiosis. In one sense, we want to do a guerilla war against it, not form up into a line and attempt march to frontal assault.

Questions and Answers

• Do you know if my ME is due to the covid with these results?
  • It is impossible to tell from the microbiome. COVID could make an existing case of ME/CFS worse. If you were fine prior, then it is likely that COVID causes ME (i.e. Long COVID). Over time the dysbiosis between ME/CFS and Long COVID become very similar.
• I’m allergic to penicillin (amoxycillin, etc.). What antibiotics can I take without it?
  • The best antibiotics that have been used by ME/CFS specialist were computed to be:
    • chloroquine diphosphate — anti-malarial and anti-rheumatoid agent and belongs to the drug class 4-aminoquinoline
    • dapsone – a sulfone, It works by decreasing swelling (inflammation) and stopping the growth of bacteria
    • neomycin –  belongs to the aminoglycosides group of antibiotics
    • metronidazole – belongs to the nitroimidazole antimicrobials. Metronidazole is one of the mainstay drugs for the treatment of anaerobic bacterial infections, protozoal infections, 
    • lymecycline –  tetracycline antibiotics.
  • My own preference would be to start with a tetracycline (lymecycline), followed by metronidazole, and then neomycin. This is largely based on the frequency of use that I have seen in the literature. At that point you should be retested.
    • I would follow Jadin’s pattern: 1 week on, 3 weeks off and then rotate to the next antibiotic.

Postscript – and Reminder

I am not a licensed medical professional and there are strict laws where I live about “appearing to practice medicine”.  I am safe when it is “academic models” and I keep to the language of science, especially statistics. I am not safe when the explanations have possible overtones of advising a patient instead of presenting data to be evaluated by a medical professional before implementing.

I can compute items to take, those computations do not provide information on rotations etc.

I cannot tell people what they should take or not take. I can inform people items that have better odds of improving their microbiome as a results on numeric calculations. I am a trained experienced statistician with appropriate degrees and professional memberships. All suggestions should be reviewed by your medical professional before starting.

The answers above describe my logic and thinking and is not intended to give advice to this person or any one. Always review with your knowledgeable medical professional.

Back Story

We would really like to take you up on your offer to make a youtube video (anonymous) to analyze my gut test results (OMBRE). We took a first pass on the website and found some interesting results but are a little overwhelmed at the suggestions. For reference, I have chronic fatigue after mostly recovering from POTS via the GAPS diet. This all started after giving birth. I attached the CSV from OMBRE in hopes that you are willing to help us out with this!

I understand well, my own wife developed ME/CFS also after giving birth.

Analysis

Her percentages of percentiles does not show the typical ME/CFS pattern which appears consistent with improvements from the GAPS diet.

Looking at General Health Predictors we have 17 predictors that are looking bad. Anti inflammatory Bacteria Score is 30%ile so inflammation is likely an issue

Going Forward

This person has entered their symptoms so we go with

Then use the filtering button to view different suggestions. The highest priority was 643, lowest -1014 (but 500 is where the list starts) so we will look to take items over 300 and aggressively avoid items below -250. The dosages come from this summary page that links to studies, dosages should be reviewed by your MD before starting.

• Vitamins (This looks like the usual list for ME/CFS and all are very high in priority, review dosages with your MD before starting)
  • Vitamin B1,thiamine hydrochloride – 1800   mg/day
  • Vitamin C (ascorbic acid) – 3000   mg/d
  • vitamin B3,niacin – 1000 mg/day
  • Vitamin B6,pyridoxine hydrochloride – 50 mg/day
  • vitamin B7, biotin –300 mg/day
  • Vitamin B9,folic acid – 5 mg/day
  • Vitamin B-12 – 10   mg/day
• Supplements
  • melatonin supplement
  • Hesperidin (polyphenol)
  • Arbutin (polyphenol)
  • diosmin (polyphenol)
  • luteolin (flavonoid)
• Probiotics
  • lactobacillus kefiri (NOT KEFIR) – available in Italy only
• Food and Diet
  • gluten-free diet
  • Caffeine
  • Just below 300, whole-grain barley with flaxseed (Note: barley has a different form of gluten then other grains)

Antibiotics

Usually these are not an option. But the suggested ones that are used by ME/CFS specialist are shown below

Avoids

• Supplements AVOIDS
  • pectin
  • oligosaccharides (prebiotic)
  • dietary phytoestrogens (isoflavones)
  • non-starch polysaccharides
  • Slippery Elm
  • inulin (prebiotic)
  • resistant maltodextrin
• Foods and Diet AVOIDS
  • fasting
  • Olive Oil
  • apple
  • Pulses
  • wheat bran
  • cruciferous vegetables (broccoli cabbage)
  • high fiber diet
  • soy
• Probiotics AVOIDS
  • lactobacillus plantarum (probiotics)
  • lactobacillus rhamnosus gg (probiotics)
  • bacillus coagulans (probiotics)

Try for 8 weeks, then retest

While waiting for test results, keep to the suggestions.

Questions And Answers

• When I got the list of suggestions, I started them all at once and herxed terribly. So much that I has to stop!
  • As is common with ME/CFS people, you want to be done with the disease so much you toss yourself into it. I have been there and done that. The key is rotate and pulse. Avoid substances that cause herx that is longer than 6 hours — you are not ready for those, we need to take the longer path instead of trying to climb a cliff face.
  • Try this pattern:
    • Take the probiotics, herbs and non-vitamin supplements into groups.
      • Week 1: take the probiotic for a week (#1 in priority)
      • Week 2: take one herb for a week (#1 in priority)
      • Week 3: one supplement for a week (#1 in priority)
      • Then go back to probiotic BUT take a different one (i.e. #2 in priority), same pattern for other things
    • After 8-12 weeks do a retest and see where suggestions have shifted
    • The goal is to destabilize a stable dysbiosis. In one sense, we want to do a guerilla war against it, not form up into a line and attempt march to frontal assault.
• You mentioned my patterns are inconsistent with people with CFS yet the suggestions are very consistent with people with CFS. Does this mean my patterns are less severe or is this wishful thinking?
  • Compared to the sample that I shared with you, less severe is my guess. You have less severe dysbiosis. ME/CFS has a wide variety of symptoms; each have great variability.
• I’m wondering if you think I should pursue the antibiotic route or if you think this should be last resort? Many people take garlic extract as a natural alternative to antibiotics. Do you think this might help/hurt?
  • My personal preference is antibiotics done correctly (pulses and rotation following Dr. Jadin’s approach). The reality is that it is often hard or impossible to get a prescribing physician on board – especially keeping on the antibiotics after significant improvement.
  • Garlic is a low positive [garlic (allium sativum)] so you are fine taking it. Remember that you should pulse it, ideally with other antibiotic herbs— none of them made it into the top set, but the low positive ones are below (all are higher priority over garlic):
    • hypericin, St. John’s Wort
    • thyme (thymol, thyme oil)
    • ginger
    • neem
    • tulsi
    • eugenol (from clove oil, nutmeg, cinnamon, basil,bay leaf.)
• You mentioned I have several pathogenic bacteria. What’s the best way to get rid of them? Is there a targeted antibiotic? 
  • All antibiotics have side-effects because they are broad spectrum. The computations for suggestions include these pathogenic bacteria — so rotating thru the antibiotics suggested should address these. My preference would be to do — in this sequence —
    1. metronidazole (antibiotic)s[CFS]
    2. azithromycin,(antibiotic)s[CFS]
    3. lymecycline (antibiotic)[CFS]
    4. clindamycin (antibiotic)s[CFS]
• You mentioned the general health predictors show 17 that are looking bad. Could you elaborate a bit on this?
  • Those bacteria comes from these studies:
  • A predictive index for health status using species-level gut microbiome profiling [2020]
  • Gut Microbiome Wellness Index 2 for Enhanced Health Status Prediction from Gut Microbiome Taxonomic Profiles [2023]
  • Microbiome-based disease prediction with multimodal variational information bottlenecks [2022]
    

Postscript – and Reminder

I am not a licensed medical professional and there are strict laws where I live about “appearing to practice medicine”.  I am safe when it is “academic models” and I keep to the language of science, especially statistics. I am not safe when the explanations have possible overtones of advising a patient instead of presenting data to be evaluated by a medical professional before implementing.

I can compute items to take, those computations do not provide information on rotations etc.

I cannot tell people what they should take or not take. I can inform people items that have better odds of improving their microbiome as a results on numeric calculations. I am a trained experienced statistician with appropriate degrees and professional memberships. All suggestions should be reviewed by your medical professional before starting.

The answers above describe my logic and thinking and is not intended to give advice to this person or any one. Always review with your knowledgeable medical professional.

The table below is based on Biomesight samples which has been annotated with self-reporting symptoms. A factor of 16 means no ability to predict.

• A value of 20 indicates about a 56% chance of correctly predicting both With and Without
• A value of 25 indicates about a 66% chance of correctly predicting both With and Without
• A value of 30 indicates about a 70% chance of correctly predicting both With and Without

The chance can increase significantly (90+%) when you are willing to have a higher percentage of false positive.

The Table

Symptom Name	Factor
Neurological-Sleep: Sleep Apnea	30.42
Comorbid: Sugars cause sleep or cognitive issues	29.39
Comorbid: Panic Attacks	29.30
Comorbid: Carbohydrate intolerance	28.89
Official Diagnosis: Hypercholesterolemia (High Cholesterol)	28.51
DePaul University Fatigue Questionnaire : Fever & Chills	28.14
Neurological: Disorientation	27.99
Comorbid: Sleep Apnea Diagnosis	27.83
Comorbid: Salicylate sensitive	27.49
Pain: Eye pain	27.46
Neurological: Seasonal Affective Disorder (SAD)	27.39
Comorbid-Mouth: Gingivits / Gum Disease	27.31
Condition: Generalized anxiety disorder	27.21
Condition: Post-Traumatic Stress Disorder	27.09
DePaul University Fatigue Questionnaire : Night sweats	27.05
Neurological-Sleep: Night Sweats	26.96
Autonomic Manifestations: exertional dyspnea	26.96
Comorbid: Constipation and Explosions (not diarrohea)	26.46
Autonomic Manifestations: cardiac arrhythmias	26.39
Neurological-Sleep: Vivid Dreams/Nightmares	26.39
Autism: High Functioning	26.32
DePaul University Fatigue Questionnaire : Tense muscles	26.27
Infection: Lyme	26.26
Comorbid: Mold Sensitivity / Exposure	26.26
Autonomic Manifestations: Cortisol disorders or irregularity	26.22
Onset: less than 32 years since onset	26.14
DePaul University Fatigue Questionnaire : Frequently get words or numbers in the wrong order	26.05
Pain: Sensitivity to pain	26.02
Blood Type: B Positive	25.99
Other: Sensitivity to vibrations	25.97
Autonomic Manifestations: bladder dysfunction	25.96
Joint: Stiffness and swelling	25.95
Comorbid: Raynaud’s syndrome (Skin discoloration)	25.93
DePaul University Fatigue Questionnaire : Confusion/disorientation	25.87
DePaul University Fatigue Questionnaire : New trouble with math	25.87
Immune Manifestations: Thick blood / Hypercoagulation	25.82
DePaul University Fatigue Questionnaire : Concern with driving	25.82
DePaul University Fatigue Questionnaire : Weight change	25.79
Pain: Myofascial pain	25.77
Comorbid-Mouth: Mouth Sores	25.76
DePaul University Fatigue Questionnaire : Chilled or shivery	25.74
Official Diagnosis: Fibromyalgia	25.73
Neuroendocrine: Feeling like you have a high temperature	25.65
Neurological-Sleep: Chaotic diurnal sleep rhythms (Erratic Sleep)	25.54
Neuroendocrine Manifestations: Excessive adrenaline	25.52
Neurological: fasciculations	25.50
Age: 60-70	25.48
Autonomic: Inability to tolerate an upright position	25.39
Comorbid: Mood Swings	25.38
Comorbid: Inflammatory bowel disease	25.37
Autonomic Manifestations: urinary frequency dysfunction	25.32
Autonomic: Dizziness or fainting	25.31
DePaul University Fatigue Questionnaire : Depression	25.30
Neuroendocrine: Temperature fluctuations throughout the day	25.29
Comorbid: Restless Leg	25.29
Comorbid: Snoring (NOT Sleep Apnea	25.29
DePaul University Fatigue Questionnaire : Nausea	25.28
Official Diagnosis: Attention deficit hyperactivity disorder (ADHD)	25.24
DePaul University Fatigue Questionnaire : Feeling like you have a temperature	25.22
Infection: Human Herpesvirus 6 (HHV6)	25.22
Neurological: High degree of Empathy before onset	25.21
DePaul University Fatigue Questionnaire : Chemical sensitivity	25.19
DePaul University Fatigue Questionnaire : Sore Throat	25.17
Neuroendocrine Manifestations: abnormal appetite	25.17
General: Anhedonia (inability to feel pleasure)	25.13
Neurological-Vision: Blurred Vision	25.09
Neurological-Vision: photophobia (Light Sensitivity)	25.02
Immune Manifestations: tender lymph nodes	24.97
DePaul University Fatigue Questionnaire : Upset stomach	24.95
Pain: Aching of the eyes or behind the eyes	24.86
Neurological: Confusion	24.86
Neuroendocrine Manifestations: marked weight change	24.83
DePaul University Fatigue Questionnaire : Dizziness	24.74
Neuroendocrine Manifestations: subnormal body temperature	24.68
DePaul University Fatigue Questionnaire : Racing heart	24.64
Immune: Tender / sore lymph nodes	24.62
Comorbid: Fibromyalgia	24.58
Comorbid: Migraine	24.54
General: Myalgia (pain)	24.54
Neurocognitive: Feeling disoriented	24.51
Official Diagnosis: Depression	24.34
Neurocognitive: Unable to focus vision and/or attention	24.34
Neurological: Neuropathy	24.34
DePaul University Fatigue Questionnaire : Abnormal sensitivity to light	24.32
Physical: Good Air Quality	24.27
Official Diagnosis: Gastroesophageal reflux disease (GERD)	24.27
Joint: Tenderness	24.26
Physical: Tonsils removed	24.24
Comorbid: Methylation issues (MTHFR)	24.23
DePaul University Fatigue Questionnaire : Tingling feeling	24.20
Other: Sensitivity to mold	24.17
Neurological: emotional overload	24.17
Official Diagnosis: COVID19 (Fully Recovered)	24.15
Comorbid-Mouth: Dry Mouth	24.13
Physical: Steps Per Day 8000-16000	24.12
Autonomic: Shortness of breath	24.04
Neuroendocrine: Lack of appetite	24.03
DePaul University Fatigue Questionnaire : Slow to react	23.99
Neuroendocrine Manifestations: loss of adaptability	23.93
DePaul University Fatigue Questionnaire : Rash	23.90
Autonomic: Irregular heartbeats	23.87
Physical: Organic Diet	23.80
Immune: Viral infections with prolonged recovery periods	23.79
Autonomic Manifestations: light-headedness	23.75
DePaul University Fatigue Questionnaire : Trouble expressing thoughts	23.70
DePaul University Fatigue Questionnaire : Feel unsteady on feet	23.61
Official Diagnosis: Mast Cell Dysfunction	23.61
Onset: less than 02 years since onset	23.60
Neurological: Difficulty reading	23.59
Neurological: Difficulty processing information (Understanding)	23.57
Immune Manifestations: Inflammation of skin, eyes or joints	23.55
Neuroendocrine Manifestations: sweating episodes	23.42
Neurological: Executive Decision Making (Difficulty making)	23.39
DePaul University Fatigue Questionnaire : Absent-mindedness	23.34
General: Heavy feeling in arms and legs	23.32
Infection: Epstein-Barr virus	23.30
DePaul University Fatigue Questionnaire : Abdomen pain	23.29
Neuroendocrine Manifestations: Air Hunger	23.25
Pain: Joint pain	23.25
Neurological-Sleep: Inability for deep (delta) sleep	23.24
Autonomic Manifestations: Orthostatic intolerance	23.20
DePaul University Fatigue Questionnaire : Does physical activity make you feel better	23.18
Comorbid: Multiple Chemical Sensitivity	23.15
Post-exertional malaise: Next-day soreness after everyday activities	23.13
Official Diagnosis: Autoimmune Disease	23.09
DePaul University Fatigue Questionnaire : Frequently loose train of thought	23.09
Immune Manifestations: Mucus in the stool	23.08
Condition: Non-Celiac Gluten Sensitivity	23.05
DePaul University Fatigue Questionnaire : Difficulty retaining information	23.04
DePaul University Fatigue Questionnaire : Slowness of thought	23.01
Neurological: Dysautonomia	22.95
DePaul University Fatigue Questionnaire : Difficulty reasoning things out	22.94
Comorbid-Mouth: TMJ / Dysfunction of the temporomandibular joint syndrome	22.93
DePaul University Fatigue Questionnaire : Eye pain	22.92
DePaul University Fatigue Questionnaire : Pain in Multiple Joints without Swelling or Redness	22.90
Neuroendocrine Manifestations: Painful menstrual periods	22.90
Neurological: Myoclonic jerks or seizures	22.89
DePaul University Fatigue Questionnaire : Shortness of breath	22.88
Autonomic: Ocassional Tachycardia (Rapid heart beat)	22.86
Immune Manifestations: recurrent flu-like symptoms	22.86
Neurological: Cognitive/Sensory Overload	22.84
DePaul University Fatigue Questionnaire : Difficulty following things	22.84
Autonomic Manifestations: Postural orthostatic tachycardia syndrome (POTS)	22.83
Immune: Chronic Sinusitis	22.83
DePaul University Fatigue Questionnaire : Temperature lower than normal	22.82
DePaul University Fatigue Questionnaire : Impaired Memory & concentration	22.76
Comorbid: Hypothyroidism	22.74
DePaul University Fatigue Questionnaire : Hot or Cold spells	22.72
Official Diagnosis: Autism	22.72
DePaul University Fatigue Questionnaire : Muscle weakness	22.68
Neuroendocrine Manifestations: Muscle weakness	22.64
Autonomic Manifestations: nausea	22.62
Autonomic: Nausea	22.59
Age: 30-40	22.59
Blood Type: O Positive	22.58
DePaul University Fatigue Questionnaire : Mood swings	22.58
Sleep: Need to nap daily	22.57
Neuroendocrine: Feeling hot or cold for no reason	22.53
DePaul University Fatigue Questionnaire : Sensitivity to Alcohol	22.52
DePaul University Fatigue Questionnaire : Blurred Vision	22.49
Onset: less than 04 years since onset	22.47
Physical: Amalgam fillings	22.43
Neuroendocrine Manifestations: Paraesthesia (tingling burning of skin)	22.42
Post-exertional malaise: Mentally tired after the slightest effort	22.40
Neurological-Vision: inability to focus eye/vision	22.38
Immune: Recurrent Sore throat	22.38
DePaul University Fatigue Questionnaire : Difficulty staying asleep	22.37
DePaul University Fatigue Questionnaire : Need to have to focus on one thing at a time	22.37
DePaul University Fatigue Questionnaire : Ringing in the Ears	22.34
Immune Manifestations: Diarrhea	22.26
General: Headaches	22.25
Immune Manifestations: Hair loss	22.25
DePaul University Fatigue Questionnaire : Difficulty comprehending Information	22.24
Neuroendocrine Manifestations: Rapid muscular fatiguability	22.24
Post-exertional malaise: Worsening of symptoms after mild mental activity	22.24
Physical: Breastfed	22.23
Physical: Long term (chronic) stress	22.22
DePaul University Fatigue Questionnaire : Headaches	22.21
Physical: Steps Per Day 2000-4000	22.21
Neuroendocrine: Lost or gained weight without trying	22.19
Autonomic Manifestations: irritable bowel syndrome	22.18
Post-exertional malaise: Physically drained or sick after mild activity	22.15
General: Depression	22.15
Physical: Pets	22.14
Neurological: Joint hypermobility	22.12
DePaul University Fatigue Questionnaire : Forgetting what you are trying to say	22.10
Neurological-Audio: hypersensitivity to noise	22.04
Comorbid: High Anxiety	22.02
Immune Manifestations: Inflammation (General)	21.97
Age: 50-60	21.94
Onset: 2000-2010	21.89
Immune: Flu-like symptoms	21.85
DePaul University Fatigue Questionnaire : Anxiety/tension	21.78
Sleep: Waking up early in the morning (e.g. 3 AM)	21.76
Post-exertional malaise: Muscle fatigue after mild physical activity	21.75
Post-exertional malaise: Physically tired after minimum exercise	21.70
Comorbid: Constipation and Diarrohea (not explosions)	21.70
DePaul University Fatigue Questionnaire : Muscle Pain (i.e., sensations of pain or aching in your muscles. This does not include weakness or pain in other areas such as joints)	21.69
Comorbid-Mouth: Bruxism – Jaw cleanching / Teeth grinding	21.65
Condition: Acne	21.63
Immune: Sensitivity to smell/food/medication/chemicals	21.61
Blood Type: A Positive	21.61
Immune Manifestations: Abdominal Pain	21.59
Physical: Northern European	21.58
Pain: Pain or aching in muscles	21.54
Neuroendocrine Manifestations: intolerance of extremes of heat and cold	21.52
General: Sinus issues with headaches	21.48
Post-exertional malaise: Post-exertional malaise	21.48
Post-exertional malaise: Rapid muscular fatigability,	21.44
Neuroendocrine: Cold limbs (e.g. arms, legs hands)	21.42
Immune Manifestations: Chronic Flatus / Flatulence / gas	21.39
DePaul University Fatigue Questionnaire : Allergies	21.39
DePaul University Fatigue Questionnaire : Does physical activity make you feel worse	21.37
Onset: less than 16 years since onset	21.35
Neuroendocrine Manifestations: Dry Eye (Sicca or Sjogren Syndrome)	21.35
Neurocognitive: Slowness of thought	21.35
Neurological: Word-finding problems	21.30
Neurological: Impairment of concentration	21.29
Immune Manifestations: new food sensitivities	21.28
Post-exertional malaise: Worsening of symptoms after mild physical activity	21.27
Physical: Steps Per Day 4000-8000	21.26
Immune Manifestations: Alcohol Intolerant	21.25
Physical: Steps Per Day < 2000	21.24
Condition: ME/CFS without IBS	21.23
DePaul University Fatigue Questionnaire : Need to nap during each day	21.23
DePaul University Fatigue Questionnaire : Poor Appetite	21.23
DePaul University Fatigue Questionnaire : Fatigue	21.21
Physical: Eastern European	21.21
Neurocognitive: Can only focus on one thing at a time	21.20
Condition: ME/CFS with IBS	21.15
Neurocognitive: Problems remembering things	21.13
DePaul University Fatigue Questionnaire : Difficulty recalling information	21.10
DePaul University Fatigue Questionnaire : Difficulty falling asleep	21.08
Sleep: Daytime drowsiness	21.07
Neurocognitive: Absent-mindedness or forgetfulness	21.07
Post-exertional malaise: Rapid cognitive fatigability,	21.05
Onset: Sudden	21.03
DePaul University Fatigue Questionnaire : Easily irritated	21.03
DePaul University Fatigue Questionnaire : Walking up early in the morning (e.g. 3AM)	21.03
Immune Manifestations: medication sensitivities.	21.01
Neurological-Audio: Tinnitus (ringing in ear)	20.98
Comorbid: Small intestinal bacterial overgrowth (SIBO)	20.96
Physical: Work-Sitting	20.96
Neuroendocrine: Alcohol intolerance	20.91
Neurological-Sleep: Insomnia	20.91
Onset: Gradual	20.90
Neurocognitive: Difficulty understanding things	20.84
Autonomic Manifestations: palpitations	20.80
Neurological: Short-term memory issues	20.71
DePaul University Fatigue Questionnaire : Post-exertional malaise, feeling worse after doing activities that require either physical or mental exertion	20.52
Autonomic: Heart rate increase after standing	20.51
Immune Manifestations: Bloating	20.51
DePaul University Fatigue Questionnaire : Unrefreshing Sleep, that is waking up feeling tired	20.49
DePaul University Fatigue Questionnaire : Difficulty finding the right word	20.46
Comorbid: Histamine or Mast Cell issues	20.41
Gender: Female	20.35
Post-exertional malaise: Inappropriate loss of physical and mental stamina,	20.33
Neurocognitive: Difficulty expressing thoughts	20.27
Post-exertional malaise: Difficulty reading after mild physical or mental activity	20.25
Official Diagnosis: Chronic Fatigue Syndrome (CFS/ME)	20.20
Post-exertional malaise: General	20.19
Official Diagnosis: COVID19 (Long Hauler)	20.18
Official Diagnosis: Allergic Rhinitis (Hay Fever)	20.06
Neuroendocrine Manifestations: Poor gut motility	20.04
Sleep: Problems staying asleep	20.03
Onset: 2010-2020	20.01
Neuroendocrine Manifestations: worsening of symptoms with stress.	19.94
Neurocognitive: Brain Fog	19.88
Immune Manifestations: general malaise	19.84
Sleep: Problems falling asleep	19.75
Neuroendocrine Manifestations: cold extremities	19.68
Official Diagnosis: Irritable Bowel Syndrome	19.64
Neurocognitive: Difficulty paying attention for a long period of time	19.57
Immune Manifestations: Constipation	19.42
Age: 20-30	19.37
Age: 40-50	18.92
Sleep: Unrefreshed sleep	18.84
General: Fatigue	18.39
Gender: Male	18.29

This is part of research in progress and intended to indicate the degree that the microbiome may contribute to various symptoms. The above was based on testing models against this data to determine how often it predicted correctly.

Work is in progress to generate suggestions to moderate the microbiome away from these symptoms.

For a list of the genus for each, see Citizen Science Symptoms To Genus Special Studies. Using 84+%ile for high to be deemed a match, and 16-% for low to be deemed a match has produced good results,

This was a request from a reader and I will do a direct approach Items reported from studies.

Items from Published Studies

1. Tryptophan: This is an amino acid that the body converts into serotonin. It’s found in foods like turkey, cheese, and nuts, but it’s also available as a supplement.
   • “Tryptophan, an indispensable amino acid, is needed to support protein deposition, and the synthesis of the neurotransmitter serotonin,”[2022]
   • “Tryptophan is the only precursor of serotonin and mediates serotonergic activity in the brain. Previous studies have shown that the administration of tryptophan or tryptophan depletion significantly alters cognition, mood and anxiety. ” [2017]
   • “Supplementation with B vitamins and magnesium has an influence on the Trp concentration.” [Tryptophan status in autism spectrum disorder and the influence of supplementation on its level, 2017]
   • Tryptophan supplementation and serotonin function: genetic variations in behavioural effects [2018]
2. 5-HTP (5-Hydroxytryptophan): This is a by-product of tryptophan and is directly converted into serotonin in the body. It’s often used as a supplement for mood enhancement.
   • Tryptophan-enriched diet or 5-hydroxytryptophan supplementation given in a randomized controlled trial impacts social cognition on a neural and behavioral level [2021]
   • 5-Hydroxytryptophan (5-HTP): Natural Occurrence, Analysis, Biosynthesis, Biotechnology, Physiology and Toxicology [2020]
     • “An excess of 5-HTP may be responsible for serotonin syndrome (see Section 8.2.1) and an excessive treatment was found to be associated with severe side effects, including behavioral disturbances, abnormal mental functions, and intolerance.”
3. St. John’s Wort: Often used for depression, St. John’s Wort is believed to affect serotonin levels, although its exact mechanism is not fully understood.
   • Extractive from Hypericum ascyron L promotes serotonergic neuronal differentiation in vitro [2018]
   • Mechanism of action of St John’s wort in depression : what is known? [2003]
     • “St John’s wort extract leads to a downregulation of beta-adrenergic receptors and an upregulation of serotonin 5-HT(2) receptors in the rat frontal cortex”
4. SAMe (S-adenosylmethionine): This is a compound naturally found in the body that is thought to enhance neurotransmitter production, including serotonin.
   • “Use of SAMe elicited no significant adverse effects beyond placebo, however it was implicated in one case of serotonin syndrome-like symptoms.” [2018]
5. Omega-3 Fatty Acids: Found in fish oil and certain plant oils, omega-3 fatty acids are linked to improved mental health and mood regulation, possibly through influencing serotonin pathways.
   • Effect of the dietary intake of fish oil on psycho-social behavioral disorder caused by social-defeat stress [2022] “This improvement could be explained by the increase in serotonin synthesis in the hippocampus.”
   • “Fish-oil supplementation decreases Indoleamine-2,3-Dioxygenase expression and increases hippocampal serotonin levels in the LPS depression model” [2020]
6. Vitamin B6 and B12: These vitamins are important for serotonin production. A deficiency in these vitamins can lead to reduced serotonin levels.
   • “vitamin B6, a cofactor in the tryptophan-serotonin pathway critical to mood regulation.” [2023]
   • Link between higher levels of homocysteine and depression [2012]
     • “Homocystcinc is reconstituted into methionine, which is essential to the production of neurotransmitters such as serotonin and dopamine which elevate mood. This reconstitution requires B-group vitamins, especially folic acid and B12. “
7. Magnesium: This mineral plays a role in many biochemical reactions in the body and has been suggested to have a mood-stabilizing effect, possibly by influencing serotonin.
   • Effect of subacute manganese feeding on serotonin metabolism in the rat [1978]
8. Probiotics: Some research suggests that gut health can impact serotonin levels, as a significant amount of this neurotransmitter is produced in the gut.
   • lactobacillus plantarum
     • Lactobacillus plantarum PS128 Promotes Intestinal Motility, Mucin Production, and Serotonin Signaling in Mice.
     • Lactobacillus plantarum DR7 Modulated Bowel Movement and Gut Microbiota Associated with Dopamine and Serotonin Pathways in Stressed Adults.
   • Lactobacillus rhamnosus GG
     • Lactobacillus rhamnosus GG supernatant upregulates serotonin transporter expression in intestinal epithelial cells and mice intestinal tissues.
   • Mutaflor (Escherichia coli strain Nissle 1917)
     • Escherichia coli Nissle 1917 enhances bioavailability of serotonin in gut tissues through modulation of synthesis and clearance

Foods

• Foods with Tryptophan: “chicken, soya beans, cereals, tuna, nuts and bananas’ may serve as an alternative to improve mood and cognition. ‘ [2013]
  • Web MD List
  • National Institute of Health
• Withania somnifera ( ashwagandha)
  • “subjects showed significant increases in serum serotonin, gastrin,” [2024]
• kiwifruit
  • ” treatments increased urinary concentration of the serotonin metabolite” [2023]
• poly-γ-glutamic acid with vitamin B6
  • “a greater increase in the group C intervention (4.59 ± 38.5 ng/mL) in serum serotonin concentrations’ [2021]

Vitamin D has no effect (multiple studies)

In this post I will show the results of a series of experiments using the results of prior posts, . The philosophical question being asked is this “How useful is a result showing that genus X mean is higher with a condition then without for screening individuals?” (i.e. with statistical significance of P < 0.01 or better).

Often studies will provide a statement such as the one shown below.

Men with higher VFA harbored a smaller relative abundance of Blautia and Bifidobacterium (P for trend: 0.003 and 0.021, respectively),

Blautia genus associated with visceral fat accumulation in adults 20-76 years of age [2019]

While it is possible to compute the t-score from p < 0.003 [assuming sample size of 100 was used, then 2.871] and then a priori apply it to the mean and standard deviation of population for a specific lab (per million) [mean: 89,844, standard deviation: 60,542] and get a proxy mean for male VFA = mean – 2.871 * StdDev/ 10 => 43,160.

We do not have an answer for the probability of a sample with 50,000 or 20,000 units. We could assume we have a normal distribution but that is an naïve assumption. A normal distribution would have average and median co-located. For some bacteria, the mean is at the 90th percentile.

On my citizen science site, I kludged in some prediction algorithms which has been well received (including by medical practitioners reporting that it often identifies symptoms that the patient forgot to mention). I would like to improve and validate these prediction algorithms using more traditional methods.

This is a bit of a wandering post as I explore various approaches.

To investigate this, I am using a dataset processed through a single process (Biomesight.com) of 2585 samples (the Population). From these 2585 samples, we compute the percentile ranking of the percentage of each taxa. Of these samples, some 1080 (the Sample) have annotated with self-declared symptoms or conditions with 279 different symptoms. We selected only symptoms with more than 36 samples annotated with that symptom. We will work at the genus level only so each variable is conceptually reasonably independent.

With this data, we will try to construct and then test models for the hundred of symptoms sets available.

Foundations

We start with the t-scores we obtained from regression on the count per million of each genus against symptoms [1 below]. There are multiple of other possibilities as shown below. These were initially explored and none showed significant better results than [1] after running 48,000 models.

1. Based on the average, standard deviation, ratio between with and without symptom of the percentage of the microbiome — ignoring not reported [C]
2. Based on the average, standard deviation, ratio between with and without symptom of the percentage of the microbiome deeming not reported to be a zero [CN]
3. Based on the average, standard deviation, ratio between with and without symptom of the percentile over all samples — ignoring not reported [P]
4. Based on the average , standard deviation, ratio between with and without symptom of the percentile over all samples — deeming not reported to be a zero [PN]
5. Based on those above or below the Nth percentile between with and without symptom — ignoring not reported [#]
6. Based on those above or below the Nth percentile between with and without symptom — deeming not reported to be a zero [#N]

Percentiles can be useful because it transforms the data into a uniform continuous distribution and should always be explored with microbiome data. I will return to this in subsequent posts.

T-scores

Each genus to symptom analysis results in a t-score. We will use the following 4 values in our tests.

• 1.28 (90%)
• 2.33 (99%)
• 3.10 (99.9%)
• 3.73 (99.99%)

In our regression analysis we obtain the following average counts across symptoms. We also factor in prevalence since some significant genus may be rarely seen to determine the expected number of genus that a sample may have reported that matches our regression pattern.

• t-score: 1.28: average number of genus: 317, with prevalence factored in: 94
• t-score: 2.22: average number of genus: 294, with prevalence factored in: 85
• t-score: 3.1: average number of genus: 270, with prevalence factored in: 76
• t-score: 3.73: average number of genus: 243, with prevalence factored in: 64

Number of Standard Deviations

The process of doing +/- 1 standard deviation will eliminate some significant genus, if the value is below zero or above the population (a nominal 1,000,000) the using it as a test becomes moot.

• t-score: 1.28: with prevalence factored in: 94;1 std dev is 38 , 2 std dev is 34
• t-score: 2.22: with prevalence factored in: 85; 1 std dev is 34, 2 std dev is 30
• t-score: 3.1: with prevalence factored in: 76; 1 std dev is 30, 2 std dev is 26
• t-score: 3.73:with prevalence factored in: 64; 1 std dev is with 25, 2 std dev is 22

With 1 std dev, the expected number of match per sample is 16% (thus 4 to 5.4). These numbers are on the edge for usability with Pearson’s Chi Square (for discussion see chi-square test of independence rule of thumb: n > 5). Increasing belong one std dev drops the expected value uncomfortably low.

The chart below shows the number of genus to check against and the red line being 16% (the number of matches expected by randomness). We compute the genus by factoring in the prevalence of each genus. Roughly 30% falls below the magic threshold of having an expected mean of 5.

From this list we will take two apparently independent symptoms at the high end to see how they behave:

• Official Diagnosis: Attention deficit hyperactivity disorder (ADHD) [#264] – with 54 samples and 118 genus
• Physical: Tonsils removed (TR) [#442] – with 45 samples and 122 genus
• Brain Fog (BF) [#289] – with 339 samples and 122 genus and 60 genus

Symptom	Without	With
ADHD – Average Percentage of Matches to Possible	2.3	11.6
TR – Average Percentage of Matches to Possible	5.4	10.3
BF – Average Percentage of Matches to Possible	4.7	8.4
ADHD – Average number of Matches	2.8	6
TR – Average number of Matches	2.9	6.4
BF – Average number of Matches	0.7	1.4
ADHD – Average number of Possible	52	51
TR – Average number of Possible	52	59
BF – Average number of Possible	15	16
ADHD – Average of individual Chi squares	5.3	2.1
TR – Average of individual Chi squares	4.4	3.2
BF- Average of individual Chi squares	1.3	1.6

The numbers above interesting and unexpected. with 50 possible matches and 1 standard deviation, we expect 16% to be matched at random. We observe With being below at 11% and without being in the 2-5% range.

With ADHD we tested to see percentage correct with different percentages as a threshold.

Percentile Match	With	Without
12	48	72
11	52	90
10	61	87
9	62	81
8	72	77
7	77	72
6	79	64
5	79	57

To clarify this table, we will use percentile match of 5. We correctly identify 79% of people with ADHD that have that condition. We only correctly identify 57% of people that are normal and identify 43% of normal people are identify as having ADHD. So, with 100 people with ADHD and 100 without, we end up with 79+43 = 122 people predicted to have ADHD, of which 64.5% are correctly identify. Since the incidence of ADHD is about 5%, then for a random population we end up with 79 +(20 * 43) with ADHD suggested from the microbiome. This mean that only 8% of those identified as having ADHD based on the microbiome actually has it. This is clearly a weak predictive tool when used alone.

Ah, Dangerous Assumptions!

The 16% of possible tests is based on the assumption that we have independence between genus. This is a naïve and statistically dangerous assumption. Any one that is familiar with the KEGG: Kyoto Encyclopedia of Genes and Genomes knows that bacteria are far from independent. One feeds the next genus and may also produce toxins that inhibits other genus. If you make the small philosophical step that the mixture of compounds and enzymes plays a major role with symptoms then we walk into a world full of different genus sets producing similar mixtures. We are not in a one bacteria causes a condition world.

We cannot safely apply standard statistical models.

What is the bottom line?

The above was done using the following information:

• A genus or other rank is reported to be statistically significant difference of means. We believe this data may come from a different lab sample processing (assuming reasonableness).
  • We ignore the amount of difference. The amount of difference is very dependent on a lab’s processing.
• We have the average and standard deviation from the lab that the sample was processed with.
• Counting those that exceeds the mean +/- 1 standard deviation will likely identify which group that the sample will likely belong to. Above we reached 75% accuracy for both groups if we have a small sample to tune it with.
• We may need a significant number of genus or other rank. We cannot focus on a few select bacteria.

Identifying the my preferred “sweet point” where the probability is equal for identifying into each group is shown above — but requires a significant number of annotated samples for each groups. There may be another novel way…. that the exploration in my next post.

Using Published Studies

Most published studies use very small sample sizes for both control and condition. A Condition-Taxon listing is available here. The number of potential taxon matches (adjusted for prevalence in Biomesight samples) is below.

Metabolic Syndrome	48.9
Mood Disorders	46.0
Type 2 Diabetes	42.9
Crohn’s Disease	40.7
Autism	37.7
Depression	37.4
Liver Cirrhosis	36.8
Long COVID	34.3
Ulcerative colitis	30.7
Obesity	28.6
Schizophrenia	26.5
COVID-19	25.5
rheumatoid arthritis (RA),Spondyloarthritis (SpA)	25.3
Carcinoma	22.5
Multiple Sclerosis	22.2
Parkinson’s Disease	20.7
Inflammatory Bowel Disease	20.6
hypertension (High Blood Pressure	20.4
Alzheimer’s disease	20.1

A frequent question is shown below

The process is simple, but partially hidden.

First login and then change display to Advance

A new menu will appear

Click Compounds x ( Producers, Consumers). After a little time the page will appear with search option. There are 18,000 items listed.

Type the item that you are interest into the search field.

In many cases, this may lead to you needing to read more. Common speech names may not match with the scientific name. In this case we have three forms of lactic acids. the (R)-Lactate is the form that the body has trouble clearing and is associated with neurological issues. There can be some effort required to get up to a reasonable understanding.

What do Zero Mean?

Some chemicals will show 0 0 – this means that it is nether produced nor consumed by bacteria in the microbiome. These may be manufactured or consumed by the body’s cell or obtained from food.

Clicking the Red or Green buttons will down load a PDF which lists the bacteria

Followed by Take and Avoid lists

REMEMBER: These are all computed from calculation and not verified by clinical studies.

The numbers takes you to a list