Group B Streptococcus (GBS) Colonization and Disease among Pregnant Women: A Historical Cohort Study

Table 2

Multivariate predictors of GBS colonization.

Characteristic	aRR	CI	P value
Maternal age at delivery (years)	0.99	(0.99, 0.99)	<0.001
Race^1
Black or African American	1.48	(1.41, 1.54)	<0.001
Other	0.92	(0.85, 1.00)	0.06
Ethnicity^2
Hispanic	0.94	(0.85, 1.03)	0.20
Other	0.79	(0.59, 1.06)	0.12
Chronic hypertension	1.03	(0.96, 1.09)	0.44
Pre-existing diabetes	1.12	(1.01, 1.23)	0.03
Autoimmune disorder	0.78	(0.61, 1.01)	0.06
Tobacco use	1.01	(0.96, 1.05)	0.83

= White or Caucasian.
²Reference = not Hispanic.
aRR = adjusted relative risk.
CI = confidence interval.
P value from a multivariable generalized linear model of all characteristics as independent variables and GBS colonization versus GBS negative as the dependent variable.