Table 3—

The effect of time (year of diagnosis) on the prevalence of gestational diabetes using multiple logistic regression

Model 1Model 2Model 3
Year of diagnosis (per 1 year)1.12 (1.09–1.14)1.10 (1.07–1.12)1.06 (1.01–1.10)
Race/ethnicity
    Other than NHW vs. NHW2.1 (1.9–2.4)2.0 (1.7–2.3)
    Missing vs. NHW1.0 (0.8–1.2)0.9 (0.7–1.3)
Maternal age (per 5 years)1.7 (1.6–1.8)1.6 (1.5–1.7)
Prior GDM (yes/no)20.7 (16.1–26.5)
  • Model 1 is unadjusted; model 2 is adjusted for race/ethnicity and maternal age (36,388 pregnancies with available data); model 3 is adjusted for race/ethnicity, maternal age, prior diagnosis of gestational diabetes (24,870 multiple pregnancies; information on previous GDM missing in 71 multiple pregnancies). NHW, non-Hispanic white.