About Restricted-Use Contractual Data

The more extensive restricted-use data, available by contractual agreement with the Carolina Population Center, 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

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

To get access to the restricted-use contractual Add Health data, prospective users must read and complete a multi-part contract. A copy of the contract in Adobe portable document format (pdf) or rich text format (rtf) is available for downloading. Please read the entire package and return all parts, fully completed, to Add Health. Applicants must also submit a $750 non-refundable fee, made payable to the University of North Carolina at Chapel Hill. The fee covers administrative and handling charges, entitles users to four hours of telephone consultation with Add Health staff, and pays for trips to user sites by Add Health staff to confirm compliance with the data-use contract.

For more information about the restricted-use datasets or the application process, email or write:

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