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Table 2 Factors associated with GBS colonization (N = 1513). (a) Categorical factors and continuous variables associated with GBS by univariate analysis—number (%) or mean ± SD, range. (B) Independent risk factors for GBS by multivariate analysis—adjusted odds ratios

From: Association of sexually-transmitted infection and African–American race with Streptococcus agalactiae colonization in pregnancy

Characteristic

GBS positive

GBS negative

p value

# Missing/NA

(a)

    

Categorical variables

    

STI during pregnancy

219/494 (44.3)

315/953 (33.1)

 < 0.01**

66

Antibiotic exposure

313/488 (64.1)

471/936 (50.3)

< 0.01**

89

AA race

519/519 (86.7)

662/970 (68.2)

< 0.01**

24

GBS in prior pregnancy

80/268 (29.9)

109/544 (20.0)

< 0.01**

701

Continuous variables

    

Age

24.1 ± 5.6, 14–44

(n = 520)

24.6 ± 5.9, 13–49

(n = 973)

0.13

10

BMI

33.7 ± 8.2, 19.4–70.1

(n = 491)

32.3 ± 7.8, 19–69

(n = 928)

< 0.01**

94

Gravidity

2.7 ± 1.8, 1–12

(n = 519)

2.7 ± 1.9, 1–20

(n = 978)

0.97

16

Characteristic

Adjusted OR

95% CI for AOR

p value

# Used

(b)

    

African–American race

2.142

2.092–3.861

< 0.01**

 

STI during pregnancy

1.309

1.035–1.653

0.02*

 

Goodness of fit (Pearson test)

  

0.45

1432

  1. CI confidence interval
  2. *Significant association with GBS at 5% level of significance (p value < 0.05)
  3. **Significant association with GBS at 1% level of significance (p value < 0.01)