Skip to content. | Skip to navigation

Personal tools
You are here: www.cpc.unc.edu → Projects → Add Health → Data
 

Add Health Data

data.jpg

The Add Health study has collected data of interest to investigators from many disciplines in the social and behavioral sciences and from many theoretical traditions.

Data are available for study from four instruments in Wave I (conducted from September 1994 through December 1995), two surveys during Wave II (conducted from April 1996 through August 1996), and several sources in Wave III (collected from August 2001 through April 2002).

Add Health data are available in two forms—a public-use dataset and a restricted-use contractual dataset. It is a central concern of the Add Health study that the confidentiality of respondents be strictly protected. Deductive disclosure concerns prevent full access to all data sources. For this reason, the distribution of data will be limited in several ways:

  1. Public-use data include only a subset of respondents.
  2. Restricted-use data (more extensive data) will be distributed only to certified researchers who commit themselves to maintaining limited access.
  3. In no case will geocodes be available to outside researchers.

The rationale for this release structure is to protect the identities of Add Health respondents while allowing access to the data to a wide range of researchers.