Table 1. Demographic information and health habits.

	African American	European ancestry
Number of subjects	1268	416
Median age (years)	28	29
BV diagnosis (n)*	22.8 % (289)	6.5 % (27)
Median BMI	29.3	24.1
Yeast infection† (n)	8.4 % (106)	4.1 % (17)
Current smokers (n)	25.7 % (326)	16.6 % (69)
Income <$20k (n)	65.4 % (829)	23.3 % (97)
Yogurt >1 per week (n)	41.8 % (530)	64.2 % (267)
Alcohol >0 past week (n)	24.4 % (309)	41.1 % (171)
Healthy‡ (n)	48.3 % (612)	75.0 % (312)
Sexual partners >1 in last year (n)	32.6 % (413)	20.0 % (83)
Pregnant self-reported (n)	19.4 % (246)	18.3 % (76)
Median number of days until due date (interquartile range)	188.5 (128.8–216.0)	158.2 (166.2–219.8)
Vaginal douching in past month (n)	14 % (177)	3.8 % (16)

^*BV was diagnosed by a physician using Amsel’s criteria (Amsel et al., 1983).

^†Yeast infection was diagnosed by a physician by wet mount microscopy.

^‡Healthy was defined as women who visited the clinic for an annual examination and did not receive a diagnosis of BV, yeast infection or sexually transmitted disease.