COVID-19 lockdowns have significantly disrupted the daily lives of children and adolescents, with increased?time at home, online learning and limited physical social interaction. This report seeks to understand the immediate effects on their mental health. Covering more than 130,000 children and adolescents across 22 countries, the evidence…

Injury is a leading cause of mortality and morbidity among adolescents in developed countries. Jessor and Jessor's Problem Behavior Theory suggests an association between risk behaviors (e.g., smoking, drunkenness, cannabis use, and sexual intercourse) and adolescent injury. The present study examined whether early engagement in risk behaviors…