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Key Resources

User Guides

Detailed documentation designed to help users understand the study design, data sets, and guidelines for analyzing the data.

Codebooks

PDF codebooks for coding responses and documenting the layout and code definitions of the data files.

Add Health Navigator

Metadata discovery tool to explore and create custom codebooks, as well as provide a wave to wave variable comparison for Waves I-VI.

Public-Use Data Sets

Access and download the public use codebooks and data sets which contain a reduced sample size (Waves I-V).

Restricted-Use Data Sets

Access the data sets available via restricted-use contract, renew contract, add researchers, and transfer or terminate contract. Data linkages are not allowable with a restricted-use contract.

Ancillary Studies

Submit an application to add new contextual or biological data to the Add Health data sets, including data linkages.

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September 23, 2025

New Add Health Contracts Management System (CMS) Now Available!

The new Contracts Management System (CMS) is now available. Any researcher interested in applying for a new restricted-use contract or renewing their existing contract may...
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September 18, 2025

Alzheimer’s Risk Factors and Cognitive Function Before Midlife: Evidence From the Add Health Study

Most U.S. Alzheimer’s disease (AD) research focuses on older adults, leaving little understanding of risk factors earlier in life across representative populations. Using nationally representative...
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September 30, 2024

New Data Release from Add Health

The following data are now available to Add Health contract researchers.  The Rural-Urban Commuting Area (RUCA) CodesRural-urban commuting area (RUCA) codes classify U.S. census tracts using...
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