biostudies-literatureUnknown4(1)Pfledderer CD<h4>Background</h4>The purpose of this study was to investigate the five-year trends in 24-hour movement behavior (24hrMB) guideline adherence among children and adolescents in the United States (U.S.) using the 2018-2022 waves of the National Survey of Children's Health (NSCH), giving particular attention to disparities in guideline adherence with respect to sex, age, and overweight/obesity status.<h4>Methods</h4>This secondary data analysis study utilized a successive independent samples design involving data from five waves (2018-2022) of the U.S. NSCH. Robust Poisson regression models were used to examine adherence to 24hrMB guidelines (physical activity [PA], screentime [ST], sleep [SL]), with survey year included as a categorical independent variable. Post-hoc marginal prevalences weJournal of activity, sedentary and sleep behaviors16https://www.ebi.ac.uk/biostudies/studies/S-EPMC12532870biostudies-literatureFive-year trends in U. S. child and adolescent 24-hour movement behavior guideline adherence, 2018-2022.PMC12532870Mullane EJHunt ETJohnson APfledderer CDParker HBrown DMYBurkart SSalvo DfalseFive-year trends in U. S. child and adolescent 24-hour movement behavior guideline adherence, 2018-2022.<h4>Background</h4>The purpose of this study was to investigate the five-year trends in 24-hour movement behavior (24hrMB) guideline adherence among children and adolescents in the United States (U.S.) using the 2018-2022 waves of the National Survey of Children's Health (NSCH), giving particular attention to disparities in guideline adherence with respect to sex, age, and overweight/obesity status.<h4>Methods</h4>This secondary data analysis study utilized a successive independent samples design involving data from five waves (2018-2022) of the U.S. NSCH. Robust Poisson regression models were used to examine adherence to 24hrMB guidelines (physical activity [PA], screentime [ST], sleep [SL]), with survey year included as a categorical independent variable. Post-hoc marginal prevalences we2025-01-01T00:00:00Z2025 Oct2026-06-04T14:14:28.683Z2026-05-10T03:11:30.477ZS-EPMC125328704110278710.1186/s44167-025-00086-8