Association between Sleep Duration, Physical Activity, and Mental Health Disorders: A Secondary Analysis of the National Survey of Children's Health 2017-2018.

Background The purpose of this article was to examine the association of sleep duration and physical activity and their interactions on mental health disorders in American children aged 6-17 years. Methods Data were analyzed from the combined 2017-2018 National Survey of Children's health. Ultimately, a total of 36370 children aged 6-17 years were selected as the samples. Weighted logistic regression models were used to estimate odds ratios and 95% confidence intervals. Results Insufficient sleep duration was associated with an increased risk for current anxiety, depression, and behavior/conduct problems (odds ratio = 1.449, 1.991, 1.375; 95% confidence interval: 1.313-1.702, 1.648-2.406, 1.162-1.627). Insufficient physical activity was associated with an increased risk for current anxiety (odds ratio = 1.448; 95% confidence interval: 1.230-1.706) and depression (odds ratio = 1.743; 95% confidence interval: 1.304-2.329). In addition, additive interactions between sleep duration and physical activity were observed on current anxiety and depression. Conclusions Insufficient sleep duration and insufficient physical activity in children were associated with mental health disorders. There is a synergistic interaction effect between insufficient sleep duration and insufficient physical activity on current anxiety and current depression.