The Add Health cohort was then followed through their transition to adulthood and research turned to understanding the determinants and consequences of developmental and health trajectories from adolescence into adulthood. Across all interview waves, comprehensive longitudinal data on health and health-related behavior were collected, including life histories of physical activity, substance use, sexual behavior, delinquency and violence, social and romantic relationships, cohabitation, marriage, childbearing, civic engagement, education, and multiple indicators of health status based on self-report (e.g., general health, mental health, chronic illness), direct measurement (e.g., overweight status and obesity), and biological measures (e.g., from blood spots, urine, and saliva).
