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. Author manuscript; available in PMC: 2015 May 15.
Published in final edited form as: Nature. 2014 Apr 16;509(7500):357–360. doi: 10.1038/nature13178

Extended Data Table 1. Most common characteristics of the individuals included in the HMP healthy cohort.

Categorical data Number of
Individuals (Total=300)
Sampled in Houston / St. Louis 150 / 150
Female / Male 151 / 149
Born in US or Canada 260
Mother born in US or Canada 227
Father born in US or Canada 229
Hispanic, Latino, or Spanish 32
Asian 34
Black 21
White 243
Ever breastfed as infant 198 (Forgot=33, NA=23)
Eats meat at least once a week 261 (NA=23)
Occupation: Student 150
Had given birth at least once 26 (NA=156)
College educated 210 (NA=16)
Had dental insurance 265 (NA=16)
Had health insurance 217 (NA=16)
Tobacco user 19
Chronic use of antidepressants 22 (Tr=9)
Chronic use of antihistamines 9 (Tr=13)
Chronic use of hormonal contraceptives 72 (Tr=15; NA=149)
Chronic use of vitamins or supplements 34 (Tr=10)
Normal BMI 178
Overweight BMI 88
Obese BMI 34
Continuous data Median (Min-Max)

Age 25 (18–40)
BMI 24 (19–34)
Pulse 71 (42–100)
Diastolic pressure 71 (50–98)
Systolic pressure 119 (91–151)
pH – Vaginal introitus 4.4 (3.3–6.5)
pH – Posterior fornix 4.0 (3.2–7.0)

(NA: data was not collected; Forgot: the subject could not recall; Tr: the medication was used transiently throughout the two or three sampling events).