Data are presented as HRs and 95% CIs, which were adjusted for demographics, socioeconomic status, birth year, multifetal pregnancies, maternal conditions and use of relevant medications using Cox proportional hazard regression, with a significance level of 5% for a two-sided test. No adjustments were made for multiple comparisons. df, degrees of freedom; IV, inverse variance; s.e., standard error; T1DM, type 1 pregestational diabetes; T2DM, type 2 pregestational diabetes.
