Are PRAMS data available to outside researchers?
Yes. Researchers may request data for studies that involve multiple jurisdictions by submitting a proposal to CDC. The submission process is outlined below.
Proposal submissions must include
- Proposal reviews are conducted once a month, on the 1st of the month. Proposals received after the 1st will be reviewed on the first day of the following month.
- Submission should be a single pdf document including: the application form, abstract, and data sharing agreement. Incomplete submissions will be returned without review.
- Submissions should be sent to PRAMSProposals@cdc.gov. File name should be the Principal Researcher’s last name (i.e. Smith_proposal).
- Researchers will receive an e-mail regarding the approval/disapproval status of their proposal 2-3 weeks after the 1st of the month. Approved proposals will be forwarded to the PRAMS sites for review.
- Datasets for approved proposals are sent out approximately 6 weeks after the date of initial review.
The PRAMS Analytic Research File contains a standard set of variables. There are five categories of the variables provided:
- Birth Certificate Variables: Selected variables from the birth certificate file are included in the data set; information on maternal and infant demographics are primarily from this source.
- Operational Variables: These variables come from the data collection process (e.g., mode the questionnaire was answered by mail or phone).
- Weighting Variables: These variables account for the PRAMS survey design and the statistical weighting of the data. These variables are needed to analyze PRAMS data using complex sample software.
- Questionnaire Variables: This is the information collected from the PRAMS survey.
- Analytic Variables: These are precalculated variables that combine different variables in the data set, often those that are restricted (e.g., body mass index [BMI] created by combining variables on maternal weight and height).
Birth Certificate/Operational/Weighting Variable Codebook
PRAMS Core Questionnaire & Analytic Variable Codebooks
The PRAMS questionnaire is revised periodically. With each revision or new phase of the questionnaire, some of the questions change. Although most indicators can be compared across phases, it is often easiest to analyze data within a single phase. The years of available data covered by the different phases are listed below:
Phase 8 (2016-2019)
Phase 7 (2012–2015)
Phase 6 (2009–2011)
Phase 5 (2004–2008)
Phase 4 (2000–2003)
Phase 3 (1996–1999)
Phase 2 (1990–1995)
Phase 1 (1988–1989) Pilot Phase
The PRAMS questionnaire has three parts: a core that all sites use; a bank of standardized optional questions that sites may select from; and site-developed questions that are usually used only by the site that developed them.
The following documents may be useful:
PRAMS has a minimum overall response rate threshold policy for the release of data. For years 2006 and earlier, this threshold was 70%. Beginning in 2007, the threshold changed to 65%; beginning in 2012 the threshold was changed to 60%; beginning in 2015 the threshold was changed to 55%; beginning in 2018 the threshold was changed to 50%. For any given year, the majority, but not all sites meet the threshold. For this reason, the number of sites with data available may vary from year to year. By requesting “All states/sites with data available” on the application form, CDC will include the appropriate
site data in the approved data sets. For more information, see Data Availability by Jurisdiction and Year: Table excel icon[XLS – 23 KB] (standard version) Table excel icon[XLS – 22 KB] (508-compliant version, accessible to people with disabilities).
For site-specific responses rates by year, see Response Rate Tables:
Researchers should carefully review the terms of the data sharing agreement before submitting abstracts or manuscripts using PRAMS data for publication. In particular, please note
- Abstracts and manuscripts must be sent to CDC for distribution to PRAMS sites for review at least 4 weeks prior to submission to conferences or journals.
- Publications using PRAMS data should include an acknowledgement of the PRAMS Working Group.
For more information about the request/proposal process, please send an inquiry to PRAMSProposals@cdc.gov.