Product Search Search Effective Health Care website Submit search Search Tip: Use double quotes around phrases to rank exact matches higher in the result list. 3 results Sort search results by Sorted by relevance Sort by date Assessing the Predictive Validity of Strength of Evidence Grades: A Meta-Epidemiological Study White Paper September 14, 2015 Comparison of Effects as Evidence Evolves From Single Trials to High-Quality Bodies of Evidence White Paper March 31, 2015 Testing the Predictive Validity of Strength of Evidence Grades Abstract September 14, 2015