About Restricted-Use Contractual Data

The more extensive restricted-use data, available by contractual agreement, will be distributed only to certified researchers who commit themselves to maintaining limited access. To be eligible to enter into a contract, researchers must have an IRB-approved security plan for handling and storing sensitive data and sign a data-use contract agreeing to keep the data confidential. Contractual data are provided as SAS export files in separate, linkable datasets and contain a hidden signature identifying the purchaser. For information about reading the SAS files with other statistical applications, please see the FAQ.

Following is a list of the restricted-use datasets. For detailed descriptions of these datasets, go to Dataset Descriptions.

• Wave I Adolescent In-Home Interview with AHPVT, Parent In-Home Questionnaire, and Adolescent In-School Questionnaire data attached
• Adolescent In-School Questionnaire
• Wave I, II School Administrator Questionnaire
• Wave II In-Home Interview
• School Information Data
• Wave III In-Home Interview, with field interviewer characteristics and STD assay results 
• Wave IV In-Home Interview
  

The following constructed datasets are available:

•  In-School Network Data

• Wave I Adolescent Pair Data
• Wave I, II Respondent Grouping File
• In-School Friendship Nominations
• Wave I, II In-Home Friendship Nominations
• Wave I, II Contextual Data
• Wave I Spatial Analysis Data
• Wave III Friend ID Numbers
• Wave III Sibling ID Numbers
• Wave III Full Sib/Twin DNA Results
• Wave III Urinalysis Data
• Wave III ASHA Data
• Wave III HPV MGEN Results
• Education Data

Getting Restricted-Use Contractual Data

In January 2010, responsibility for the dissemination of Add Health restricted-use contractual data will shift from Add Health at the Carolina Population Center to the Data Sharing for Demographic Research (DSDR) project at the Inter-University Consortium for Political and Social Research (ICPSR). To facilitate this transition, no new restricted-use data agreements are being accepted at the present time. Initiation of new contracts will resume in January 2010 when ICPSR launches an online Add Health restricted-use data contracting and dissemination system, which will ultimately allow certified researchers to gain access to the data more quickly and efficiently. Continue to check this website for updates on the launch of the new online contracting system. 

If you have a current contract and wish to pay the $100 processing fee for the Wave IV data, the fee may be paid by check or credit card.  Make checks payable to the University of North Carolina at Chapel Hill. If you have questions about payment of the non-refundable fee, contact Jodie Lee.

or write:

Add Health
Carolina Population Center
University of North Carolina
CB# 8120
Chapel Hill, NC 27516-2524

For more information on the online Add Health restricted-use data contracting system under development at ICPSR, you may also email ICPSR directly.