Abstract We aimed to investigate the association of
recreational physical activity before pregnancy with gestational
diabetes mellitus (GDM). A cross-sectional study
was performed using self-reported data from the Pregnancy
Risk Assessment and Monitoring System. The study population
included 1,052 self-reported GDM cases and
10,351 non-GDM controls. Recreational physical activity
in the 3 months before pregnancy was recalled in postpartum
structured interviews. Compared to women exercising
less than 1 day per week, women who exercised
[5 days per week in the 3 months before pregnancy had a
31% lower odds of GDM (adjusted odds ratio [aOR]: 0.69;
95% confidence interval [CI]: 0.46, 1.03). Women who
exercised 1–4 days per week had a 7% lower odds of GDM
(aOR: 0.93; 95%CI: 0.72, 1.19). We did not observe statistically
significant associations between pre-pregnancy
physical activity and GDM risk. However, the magnitude
and direction of association are consistent with previous
observational studies. These studies collectively
Abstract We aimed to investigate the association ofrecreational physical activity before pregnancy with gestationaldiabetes mellitus (GDM). A cross-sectional studywas performed using self-reported data from the PregnancyRisk Assessment and Monitoring System. The study populationincluded 1,052 self-reported GDM cases and10,351 non-GDM controls. Recreational physical activityin the 3 months before pregnancy was recalled in postpartumstructured interviews. Compared to women exercisingless than 1 day per week, women who exercised[5 days per week in the 3 months before pregnancy had a31% lower odds of GDM (adjusted odds ratio [aOR]: 0.69;95% confidence interval [CI]: 0.46, 1.03). Women whoexercised 1–4 days per week had a 7% lower odds of GDM(aOR: 0.93; 95%CI: 0.72, 1.19). We did not observe statisticallysignificant associations between pre-pregnancyphysical activity and GDM risk. However, the magnitudeand direction of association are consistent with previousobservational studies. These studies collectively
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