Pediatric Obesity Prevalence in the U.S. Military Health System, Fiscal Years 2012-2018.

INTRODUCTION: Obesity prevalence in Military Health System (MHS) children has been reported through fiscal year (FY) 2012 as consistently lower than in the general population. Our study reports military pediatric overweight, obesity, and severe obesity prevalence through FY2018. We compared FY2018 prevalence to a sample of the general population using National Health and National Health and Nutrition Examination Survey (NHANES) 2017-2018 data.

MATERIALS AND METHODS: The MHS Data Repository was queried for all children aged 2-17 years seen at any military treatment facility between FY2012 and FY2018. We calculated overweight and obesity (classes 1, 2, and 3) prevalence for each FY and performed subgroup analysis for sex, age, and sponsor rank. We also compared FY2018 to NHANES 2017-2018 data. This study was approved by the Walter Reed National Military Medical Center Institutional Review Board.

RESULTS: The prevalence of overweight and obesity was stable from FY2012 (14.4% and 11.3%, respectively) to FY2018 (14.1% and 10.7%). Rates of classes 2 and 3 obesity combined were also stable at around 2.5% of all children. In FY2018, obesity prevalence was greater in assigned males, increased with age, and was highest in 16-17-year-olds (odds ratio: 2.75) and children with an enlisted military sponsor (odds ratio: 1.78). Compared to NHANES, MHS children had lower rates of obesity (10.7% versus 19.3%) with a smaller proportion of severe obesity (24% versus 32%).

CONCLUSIONS: The prevalence of pediatric overweight and obesity in the MHS was stable over time. Disparities were observed between age and sponsor rank groups. When compared to the general population, overall obesity prevalence was lower in younger military children. Further research is needed to explore disparities and to identify optimal strategies to mitigate the increase in obesity prevalence with age.