Table 3

Predictors of delivery before gestational week 34 in women with type 1 diabetes: univariate and multivariate logistic regression analyses

Univariate logistic regressionMultivariate logistic regression
OR (95% CI)POR (95% CI)P
Prepregnancy insulin dose (IU/day)1.01 (1.00–1.03)0.0451.01 (0.99–1.03)0.32
First-trimester A1C (%)*1.3 (1.1–1.5)0.010
Third-trimester A1C (%)1.5 (1.1–1.9)0.0031.6 (1.2–2.0)0.003
Microalbuminuria2.4 (1.2–4.8)0.0151.6 (0.6–4.0)0.34
  • *First-trimester A1C was a significant predictor in a separate multivariate model without third-trimester A1C (OR 1.3 [95% CI 1.1–1.6], P = 0.004).