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## Breadcrumb

            -  Evidence and Innovation 
            -  Teen Pregnancy Prevention Evidence Review 
            -           About the Review Process      

# About the Review Process

The review is conducted for HHS by researchers from Mathematica, an independent research organization. The list of evidence-based interventions includes programs with evidence of effectiveness from data collected in the past 20 years. The most recent update includes studies published through May 2022. 

## Overview of the Review Process

The review process involved four main steps:

### Search for Studies

            We began with a **broad literature search** that            included both published and unpublished work. We scanned the            reference lists of existing research syntheses; searched the            websites of relevant federal agencies and research and policy            organizations; conducted keyword searches of electronic databases;            hand searched relevant journals and professional conference            proceedings; and issued periodic public calls for studies.          

### Screen and Select Studies

            We then            **screened studies against pre-specified eligibility              criteria.**            For example, to be eligible for the review, studies must be            conducted in the U.S., use a sample of youth age 19 or younger, and            measure program impacts on pregnancy, sexually transmitted            infections, or associated sexual risk behaviors.          

### Assess Individual Studies

              For studies that met the eligibility criteria, trained reviewers              **assessed each study** for the quality and execution              of its research design. As a part of this assessment, each study              was assigned a quality rating of              **high, moderate, or low** according to the risk of              bias in the study's impact findings. The Teen Pregnancy Prevention              Evidence Review did not examine curriculum content to make              assessments about whether a program was medically or              scientifically accurate, or inclusive of populations that are              diverse in terms of race, ethnicity, sexual orientation, and              sexual identity. Meeting the Evidence Review criteria does not              indicate HHS endorsement of a program model. See more              **here**

### Analyze Evidence for Individual Programs

                For studies that passed the review quality assessment with                either a high or moderate rating, we                **extracted and analyzed program impact estimates**                to assess evidence of effectiveness for each individual program.                Studies receiving a low quality rating were excluded from this                assessment, because the risk of bias in these studies was                considered too high to yield credible estimates of program                effectiveness.              

## Review Protocol

          A more detailed description of the review process and study ratings is          provided in the review protocol. The protocol was initially written at          the start of the review in fall 2009. The study team revised the          protocol each time the review findings were updated to include more          recent research.        

****Review Protocol, Version 7.0**          (1221 KB) and          ****Summary of Changes Document**          (242 KB)        

         This protocol is being used to update the review findings to cover research released from October 2016 through May 2023 that was not reviewed in the 2022 round of review, as well as to update review findings of previously reviewed research with newly eligible contrasts. There is an accompanying document that summarizes the key changes made between Review Protocol version 6.0 and Review Protocol version 7.0 and forecasts areas for consideration for future changes to the review protocol.         

****Review Protocol, Version 6.0**          (1277 KB) and          ****Summary of Changes Document**          (236 KB)        

          This protocol was used to update the review findings to cover research          released from October 2016 through April 2022. Changes made to the          protocol are highlighted in yellow. The most substantive changes to          the Review Protocol were made in terms of how findings will be          categorized and presented. There is an accompanying document that          summarizes the key changes made between Review Protocol version 5.0          and Review Protocol version 6.0 and forecasts areas for consideration          for future changes to the review protocol.        

****Review Protocol, Version 5.0**          (613 KB)        

          This protocol was used to update the review findings to cover research          released from July 2014 through October 2016. The protocol also          introduced two new changes to the review criteria. First, to remain          eligible for the review, programs must now have at least one study          that was conducted within the last 20 years and that found positive,          statistically significant program impacts. Second, the review team          conducted outcome specific assessments of program effectiveness.        

****Review Protocol, Version 4.0**          (699 KB)        

          This protocol was used to update the review findings to cover research          released from April 2013 through July 2014. The protocol also added a          step for assessing the implementation readiness of programs that have          met the review criteria for evidence of effectiveness.        

****Review Protocol, Version 3.0**          (709 KB)        

          This protocol was used to update the review findings to cover research          released from January 2011 through April 2013. The protocol also          clarified the review criteria related to cluster adjustments,          attrition calculations, and effect size information.        

****Review Protocol, Version 2.0**          (1 MB)        

          This protocol was used to update the review findings to cover research          released from January 2010 through January 2011. There were no changes          to the review criteria.        

****Review Protocol, Version 1.0**          (772 KB)        

          This protocol was used to conduct the initial review of the evidence,          which covered research released from 1989 through January 2010.