Add Health, 1994-2008 Public-Use Files Updated

The National Longitudinal Study of Adolescent to Adult Health (Add Health),1997-2008 [Public Use] (ICPSR 21600) has been updated with the most recently supplied data and documentation files. An ICPSR-created frequency file is provided for each wave of data in addition to the codebook made available by the Principal Investigators (PIs).  New value labels were incorporated into the data, when provided by the PIs.

Add Health is a longitudinal study of a nationally representative sample of U.S. adolescents in grades 7 through 12 during the 1994-1995 school year. The Add Health cohort was followed into young adulthood with four in-home interviews, the most recent conducted in 2008 when the sample was aged 24-32.