Trends in Mental, Behavioral, and Developmental Disorders Among Children and Adolescents in the US, 2016-2021.

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Childhood mental, behavioral, and developmental disorders (MBDD) are common and are associated with poor health and well-being. Monitoring the prevalence of MBDDs among children and factors that may influence health outcomes is important to understanding risk and promoting population health. We examined trends in parent-reported lifetime MBDDs among children and associated health promotion and risk indicators from 2016 through 2021 by using data from the National Survey of Children's Health. Estimates of prevalence and average annual percentage change were stratified by specific MBDDs and demographic characteristics (eg, sex, age, race and ethnicity). Children with any MBDDs versus none were compared overall and by MBDD subgroup on health care, family, and community indicators. From 2016 through 2021, MBDD prevalence among children aged 3 to 17 years increased from 25.3% to 27.7%; increases were specific to anxiety, depression, learning disability, developmental delay, and speech or language disorder. Unmet health care needs increased annually by an average of approximately 5% among children with MBDDs. Each year from 2016 to 2021, approximately 60% of children with MBDDs received mental or developmental services in the past 12 months. Each year, a higher percentage of parents of children with MBDDs compared with children without MBDDs reported poor mental health (14.7% MBDD, 5.7% no MBDD) and economic stress (21.6% MBDD, 11.5% no MBDD). Increasing prevalence of certain MBDDs and MBDD-associated indicators, before and during the COVID-19 pandemic, highlights the need for improved pediatric mental health training for health care providers, for prevention and intervention efforts, and for policies addressing economic stability and equitable access to mental health services.