Home

Social, Behavioral, and Biological Linkages Across the Life Course

NIH Message

On March 31, 2025, as a sponsor of this project, NIH requested that the following language be added to this website: This repository is under review for potential modification in compliance with Administration directives.

Home Page

The National Longitudinal Study of Adolescent to Adult Health (Add Health) is a longitudinal study of a nationally representative sample of over 20,000 adolescents who were in grades 7-12 during the 1994-95 school year and have been followed for six waves of data collection to date, most recently in 2022-25.

Home Page

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-VI).

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.

News and Announcements

Woman cheering in front of laptop
May 9, 2024

New Data Release

The following data are now available to Add Health contract researchers.  Wave V Baroreflex Sensitivity and Hemodynamic Recovery  This file contains constructed measures for baroreflex...
Read More
April 15, 2024

Add Health at PAA 2024

Add Health is excited to attend the PAA 2024 annual meeting from April 17 to 20, 2024 in Columbus, Ohio. Add Health Director, Dr. Robert...
Read More
March 11, 2024

Exploring the Impact of Parental Incarceration on Children’s Aspirations and Expectations

In recent decades, the pervasive issue of mass incarceration in the United States has cast a long shadow, affecting not only those imprisoned but also...
Read More
1 … 6 7 8 9 10 … 22

© Copyrights, Carolina Population Center
Add Health