Brand new data files from Wave VI of The National Longitudinal Study of Adolescent to Adult Health (Add Health) are now available! Add Health is a nationally representative longitudinal study of over 20,000 U.S. adolescents who were in grades 7–12 during the 1994–95 school year. Add Health participants have now been followed across six waves of data collection to date, the most recent in 2022–25, when participants were between the ages of 39-51. The extensive Add Health data archive includes survey data on demographics, social and family contexts, socioeconomic factors, behaviors, psychosocial and cognitive factors, physical functioning, and health, along with contextual information from schools, neighborhoods, and multiple layers of geography. The available biological data include genomic measures, blood assays, anthropometric measures, and medication data.
The newly available Wave VI data include a range of both longitudinal and novel measures. A few of the novel highlights include survey measures on the pulls and tugs of early midlife; a large battery of both web-based and in-person based cognitive measures; substantially enhanced mental and physical health measures; and a range of biomarker data that allow for analyses of both longitudinal change and new assessment. Wave VI of Add Health also added extensive measures on the social and environmental contexts in which participants live, going all the way back to Wave I in many cases.
Restricted-use Add Health data are freely available to approved contract holders.
Information on the design and carryout of Wave VI in the form of user guides is available at: https://addhealth.cpc.unc.edu/documentation/user-guides/
Information on accessing Add Health restricted data is available at: https://addhealth.cpc.unc.edu/data/restricted-use-data-sets/
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