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Public-Use Data

Wave I

The public-use dataset for Wave I contains information collected in 1994–95 from Add Health’s nationally representative sample of adolescents. This dataset consists of one-half of the core sample, and one-half of the oversample of African-American adolescents with a parent who has a college degree, chosen at random. The total number of Wave I respondents in this dataset is 6,504.

The Wave I public-use dataset includes information from each of the following sources (as available):

  • Wave I In-Home Data File, includes Wave I In-School Questionnaire Data, Wave I Parent Questionnaire Data and Add Health Picture Vocabulary Test Scores
  • Contextual data
  • In-school network data
  • Weights

Wave II

The public-use dataset for Wave II contains information collected in 1996 from Add Health’s nationally representative sample of adolescents. The interview was generally similar to that at Wave I. Questions about attributes that should not change, such as ethnic background, were not repeated. A total of 4,834 of the original Wave I respondents were re-interviewed between April through August 1996.

  • Wave II In-Home Interview
  • Contextual data
  • Weights

Wave III

The Wave III public-use data are helpful in analyzing the transition between adolescence and young adulthood. A total of 4,882 of the original Wave I respondents were re-interviewed between August 2001 and April 2002. Wave III respondents were between 18 and 26 years old.

The In-home interview Wave III dataset includes the following data files:

  • Main Respondent File: includes the In-Home Questionnaire data, AHPVT scores, and bio specimen data
  • Education Data: High School Exit Status and Math & Science Transcript data
  • Weights

Wave IV

Wave IV was designed to study the developmental and health trajectories across the life course of adolescence into young adulthood. The Wave IV public-use file contains data on 5,114 respondents, aged 24 to 32*. In Wave IV, biological data was also gathered in an attempt to acquire a greater understanding of pre-disease pathways, with a specific focus on obesity, stress, and health risk behavior.

The In-home interview Wave IV dataset includes the following data files:

  • Wave IV In-home Interview File: variables from the in-home interview, including anthropometric measures
  • Wave IV Biomarker Files: Measures of Glucose homeostasis, Measures of EBV and hsCRP, Measure of Lipids
  • Weights

Note: Wave V, Sample 1 data is disseminated via restricted-use contracts only. There will be no public use data release for Wave V, Sample 1. Only the full Wave V data will be released in public-use format.

*17 respondents in the Wave IV public-use sample were 33 years old at the time of the interview

Getting Public-Use Data

Public-use data are available from four different sources: The Odum Institute at UNC, the Inter-University Consortium for Political and Social Research (ICPSR), the Association of Religion Data Archives (ARDA), and Sociometrics. Users may obtain the data from any of these sources, depending on their needs.

Odum Institute Dataverse Network

The Odum Institute at UNC distributes the Add Health public-use data at no charge through the Odum Institute Dataverse Network. To download the data, users are required to sign a guestbook and agree to the Add Health and Dataverse terms of use. For more information or to obtain the public-use data, visit Dataverse.

ICPSR

The Inter-university Consortium for Political and Social Research (ICPSR) distributes the Add Health public-use data at no charge through its Data Sharing for Demographic Research (DSDR) project. Public-use data are available for download from the DSDR website. To download the data, returning users must log in to their MyData account; new users are required to create a MyData account. MyData is the user registration and authentication system for the ICPSR and DSDR websites. The system uses an email address as a login ID and requires a password. For more information or to obtain the public-use data, visit ICPSR.

ARDA

The Association of Religion Data Archives (ARDA) distributes public-use data at no charge. To download the data, users will be required to agree to the Add Health terms of use. For more information or to obtain the public-use data, visit ARDA.

Sociometrics

Sociometrics distributes the public-use data for a fee. For more information or to obtain the public-use data, visit Sociometrics.