Exhibit 8. Strength of Evidence for Strategies and Interventions Guide to Patient and Family Engagement: Environmental Scan Report Type of DocumentNumberSystematic reviewsSystematic review of randomized controlled trials1Systematic review of descriptive studies (quantitative / qualitative)5Single evaluative studiesRandomized controlled trial3Nonrandomized controlled trial3Cohort / case-control study0Single site intervention (pre/post) / Case series study8Single site intervention (post only)8Single descriptive studiesMixed methods study (qualitative / quantitative)2Quantitative study3Descriptive or qualitative study6Case study / description of implementation39Scholarly articles or reviews10Other (workshop summary, PowerPoint® presentation)4Return to Document Current as of May 2012 Internet Citation: Exhibit 8. Strength of Evidence for Strategies and Interventions: Guide to Patient and Family Engagement: Environmental Scan Report. May 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ptfamilyscan/ptfamilyex8.html