The National Longitudinal Study of Adolescent to Adult Health (Add Health) is a longitudinal study of a nationally representative sample of adolescents in grades 7-12 in the United States during the 1994-95 school year. The Add Health cohort has been followed into young adulthood with four in-home interviews, the most recent in 2008, when the sample was aged 24-32. Add Health is re-interviewing cohort members in a Wave V follow-up from 2016-2018 to collect social, environmental, behavioral, and biological data with which to track the emergence of chronic disease as the cohort moves through their fourth decade of life.
Longitudinal, semi-annual from 1994 to 2018
Nationally-representative of U.S. adolescents; Neighborhood-level geographies
Harris, Kathleen Mullan, and Richard J. Udry. National Longitudinal Study of Adolescent to Adult Health (Add Health), 1994-2018. Carolina Population Center, University of North Carolina-Chapel Hill.