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

decorative - people walking outside by water
December 16, 2025

Pollution Exposure and Allergies and Asthma: Evidence from the Add Health Study

A recent study using nationally representative data from Waves IV and V of the National Longitudinal Study of Adolescent to Adult Health (Add Health) examines...
Read More
November 24, 2025

Adolescents’ Survival Expectations and Premature Mortality: Evidence From the Add Health Study

There is a large pool of research focusing on how adolescents’ perceptions of survival predict important aspects of their young adult lives, especially their physical...
Read More
woman working in lab
November 19, 2025

Wave VI Biomarker Data Release

Add Health is excited to announce the following data are now available: Wave VI Anthropometrics Wave VI Cardiovascular Measures Wave VI Demographics Home Exam Wave...
Read More
1 2 3 4 5 … 22

© Copyrights, Carolina Population Center
Add Health