National Longitudinal Study of Adolescent Health

Alternate Titles(s): Add Health
UID: 10028

The National Longitudinal Study of Adolescent Health (Add Health) is a longitudinal study of a nationally representative sample of adolescents in grades 7-12 in the United States during the 1994-1995 school year. Add Health combines longitudinal survey data on respondents' social, economic, psychological and physical well-being with contextual data on the family, neighborhood, community, school, friendships, peer groups, and romantic relationships, providing unique opportunities to study how social environments and behaviors in adolescence are linked to health and achievement outcomes in young adulthood. Public-use biomarker data has been added.

Data is available from four instruments in Wave I (conducted from September 1994 through December 1995), two surveys in Wave II (conducted from April 1996 through August 1996), several sources in Wave III (collected from August 2001 through April 2002), and one in-home interview in Wave IV (conducted from January 2008 through February 2009). Data from Wave V, conducted during 2016-2018 as a mixed-mode survey to collect information on health status and indicators of chronic disease, is available upon application approval only.

1994 - 2018
Geographic Coverage
United States
Subject of Study
Subject Domain
Population Age
Child (2 years - 12 years)
Adolescent (13 years - 18 years)
Adult (19 years - 64 years)


Free to All
Fee Required
Application Required

The Add Health data files are available for free as public-use datasets through the access links and as restricted-use datasets contingent upon application approval. Public-use data is available for Waves I-IV and will contain a random one-half of the core sample, and one-half of the coversample of African-American adolescents with a parent who has a college degree. Access to Wave V data and biomarker files are restricted.

To be eligible for access to restricted-use data, research must have an IRB-approved security plan for handling and storing sensitive data, sign a data-use agreement, and pay a data processing fee. Contractual data are provided in separate, linkable datasets and contain a hidden signature identifying the purchaser.

Access via CPC UNC

Public-use datasets

Access via Dataverse

Public-use datasets in the Dataverse repository

Access via ICPSR

Public-use datasets in the ICPSR repository
Accession #: 21600

Access via CPC UNC

Restricted-use data application

Data Type
Study Type
Dataset Format(s)
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