Increased prevalence of risk factors among pregnant women in Tianjin from 1999 to 2010–2012.

Data are reported in mean ± SD or number (%).* Derived from Student’s t- test;** Derived from Chi-square test or Fisher’s exact test.Abbreviations: BMI, body mass index; BP, blood pressure; GCT, glucose challenge test.† To make age between the 1999 study and the current study comparable, age was re-calculated as at pregnancy.†† Due to difference in gestational age at GCT between the two studies, adjustment for gestational age at GCT was made for the comparison.‡ Only habitual smoking during pregnancy was available in both the study in 1999 and the current study and therefore compared between the two periods.Increased prevalence of risk factors among pregnant women in Tianjin from 1999 to 2010–2012.