Add Health releases all survey data across all waves of interview, and releases assay and test results on biospecimens, including STI test results, biomarkers, and the genotype data described above. Due to the sensitive and confidential content, Add Health data sets are distributed according to a tiered data disclosure plan designed to protect the data from the risk of direct and indirect disclosure of respondent identity. The tiered data disclosure plan consists of four versions of Add Health data that differ in the amount of detail in confidential information included. Restricted data contracts require users to take comprehensive precautions to protect the data from nonauthorized use and agreeing to use the data solely for statistical reporting and analysis. Data from all waves of the Add Health study are disseminated by the Inter-University Consortium for Political and Social Research (ICPSR) as a part of their Data Sharing for Demographic Research (DSDR) project. The DSDR Add Health webpage contains the Add Health study description, publications list, documentation files, and datasets for analysis: http://www.icpsr.umich.edu/cocoon/DSDR/STUDY/21600.xml.
