Table 4. Bray–Curtis dissimilarity between Visit 1 and Visit 2, according to socioeconomic status and antibiotic exposures for vaginal, oral, and gut body sites.

Body site/exposure	Univariate association		Multivariateassociation1		Multivariateassociation2
	Coefficent	p-value	Coefficent	p-value	Coefficent	p-value
VAGINAL
Level of EducationA	0.046	0.41	0.022	0.72	0.015	0.81
Prenatal InsuranceB	0.125	0.06	0.101	0.17	0.094	0.21
Marital/Cohabiting	0.080	0.15	0.070	0.23	0.065	0.27
Antibiotics prior to Visit 1	0.054	0.41	0.050	0.74	N/A	N/A
Antibiotics between Visit 1 and 2	0.056	0.37	0.051	0.41	N/A	N/A
ORAL
Level of EducationA	0.068	0.01	0.077	0.015	0.060	0.05
Prenatal InsuranceB	0.027	0.42	0.020	0.58	0.010	0.79
Marital/CohabitingC	0.030	0.35	0.029	0.32	0.019	0.52
Antibiotics prior to Visit 1	0.012	0.73	0.008	0.82	N/A	N/A
Antibiotics between Visit 1 and 2	0.083	0.006	0.083	0.008	N/A	N/A
GUT
Level of EducationA	0.098	0.03	0.078	0.15	0.058	0.28
Prenatal InsuranceB	0.079	0.12	0.038	0.51	0.020	0.73
Marital/CohabitingC	0.140	0.001	0.130	0.004	0.11	0.02
Antibiotics prior to Visit 1	0.031	0.53	0.022	0.66	N/A	N/A
Antibiotics between Visit 1 and 2	0.120	0.009	0.110	0.021	N/A	N/A

Notes.

¹Model controlling for age, any previous term birth, any previous preterm birth, weeks between sampling.

²Model controlling for age, any previous term birth, any previous preterm birth, weeks between sampling, and antibiotics.

^AEducation coded as 1 for high school or lower, 0 for some college or higher.

^BPrenatal insurance coded as 1 for Medicaid, 0 for Private.

^CMarital/Co-habiting coded as 1 for Single or Not cohabiting, 0 for Married or Cohabiting.

The bold styling indicates a p-value that is statistically significant at α < 0.05.