Data on risk factors for gestational diabetes mellitus (GDM) in primiparous women is limited. The aim of this study was to assess the prevalence of GDM and simultaneously evaluate the impact of age and adiposity in primiparous women at risk of GDM risk.
This observational register-based cohort study from the city of Vantaa, Finland, included all 7750 primiparous women giving birth between 2009 and 2015 without previously diagnosed diabetes mellitus.
In primiparous women the prevalence of GDM was 16.5% and mean age was 28.2 years (5.2 SD). Primiparous women aged =35 years had a significantly higher risk for GDM than women aged