Featured News and Research Highlights
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 access the CMS via the Add Health Data Portal. Researchers now have two options for accessing Add Health restricted-use data: 1. Secure Research Workspace (SRW) Contract:...
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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 data from Waves IV and V of the National Longitudinal Study of Adolescent to Adult Health (Add Health), researchers investigated whether widely cited AD risk...
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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 measures of population density, urbanization, and daily commuting. The data file including them is based on RUCA codes for census years 1990, 2000, and 2010....
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September 23, 2024
Celebrating Hispanic Heritage Month: Key Findings from Add Health’s Research on Hispanic American Communities
In honor of National Hispanic Heritage month, September 15 to October 15, Add Health would like to highlight some of the important discoveries our researchers have found thanks to our Hispanic American participants. High educational aspirations, high expectations about attending college, high parent-child relationship quality, and high friends’ GPAs were...
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