Methods Used to Assess the Quality and Strength of the Evidence Weighting According to a Rating Scheme (Scheme Given) Rating Scheme for the Strength of the Evidence Studies were reviewed and evaluated for quality according to the method outlined by the U.S. Preventive Services Task Force: I: Evidence obtained from at least one properly designed randomized controlled trial. II-1: Evidence obtained from well-designed controlled trials without randomization. II-2: Evidence obtained from well-designed cohort or case–control analytic studies, preferably from more than one center or research group. II-3: Evidence obtained from multiple time series with or without the intervention. Dramatic results in uncontrolled experiments also could be regarded as this type of evidence. III: Opinions of respected authorities, based on clinical experience, descriptive studies, or reports of expert committees. Methods Used to Analyze the Evidence Review of Published Meta-Analyses Systematic Review
Posted on: Fri, 23 Aug 2013 22:34:55 +0000