The JBI (formerly the Joanna Briggs Institute) Levels of Evidence, http://joannabriggs.org/jbi-approach.html#tabbed-nav=Levels-of-Evidence
"These levels are intended to be used alongside the supporting document outlining their use. Using Levels of Evidence does not preclude the need for careful reading, critical appraisal and clinical reasoning when applying evidence."-JBI
Transparent Reporting of Evaluations with Nonrandomized Designs, (TREND), Center for Disease Control (CDC), https://www.cdc.gov/trendstatement/
"Evidence-based public health decisions are based on evaluations of intervention studies with randomized and nonrandomized designs. Transparent reporting is crucial for assessing the validity and efficacy of these intervention studies, and, it facilitates synthesis of the findings for evidence-based recommendations. Therefore, the mission of the Transparent Reporting of Evaluations with Nonrandomized Designs (TREND) group is to improve the reporting standards of nonrandomized evaluations of behavioral and public health interventions."-TREND
