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Table 3 Odds of preterm birth from parallel cross-sectional logistic regression models (Method Parallel cross-sectional logistic regression models )

From: Statistical methods for modeling repeated measures of maternal environmental exposure biomarkers during pregnancy in association with preterm birth

  

MEHP

MBP

 

N

Odds ratio 95% confidence interval

Odds ratio 95% confidence interval

Visit 1

456

1.10 (0.93, 1.30)

1.19 (0.95, 1.48)

Visit 2

407

1.12 (0.93, 1.35)

1.15 (0.91, 1.46)

Visit 3

392

1.17 (0.96, 1.43)

1.23 (0.97, 1.55)

Visit 4

322

1.11 (0.86, 1.43)

1.34 (0.98, 1.83)

  1. Odds ratios in association with ln-unit increase in urinary phthalate metabolite concentration at each study visit. Models adjusted for maternal age at visit 1, race/ethnicity, health insurance provider, education level, BMI at visit 1, and urinary specific gravity and time of day of sample collection at each study visit.