Differences in Rate of Gestational Diabetes Between Active Duty and Non-active Duty Beneficiaries at a Military Treatment Facility.

Introduction: Gestational diabetes mellitus (GDM) affects approximately 1-14% of all pregnancies in the United States and has significant maternal and neonatal consequences. Developing GDM can increase a patient's risk of developing overt diabetes in the future which may impact a soldier's readiness. The purpose of this study is to compare the incidence of GDM in active duty females compared with civilian dependents.

Materials And Methods: This retrospective cohort analysis was performed at a military medical center with IRB approval. Active duty and dependent status women who delivered between June 1, 2014 and April 30, 2015 were identified along with incidence of GDM. Sample size calculation determined a need for 391 women in each group to observe a 5% difference in rate of GDM with a power of 80%. Chi-squared analysis was used to compare rates of GDM.

Results: Rates of GDM were similar between the two cohorts (active duty = 9.95%, dependent = 9.72%, P = .91). Age, gravidity, and prepregnancy BMI were also similar between groups. The rate of diet-controlled GDM were different between the two cohorts (active duty = 53.8%, dependent = 34.2%, P = .02).

Conclusions: This study highlights active duty females have similar rates of GDM as dependents. Gestational diabetes mellitus is known to affect short- and long-term maternal and neonatal outcomes and can impact a soldier's readiness. Further research is required to determine the long-term impact of GDM in active duty females and best practices to decrease rates of GDM in the military population.