Optimising the value of the critical appraisal skills programme (CASP) tool for quality appraisal in qualitative evidence synthesis

The value of qualitative evidence synthesis for informing healthcare policy and practice within evidence-based medicine is increasingly recognised. However, there is a lack of consensus regarding how to judge the methodological quality of qualitative studies being synthesised and debates around the extent to which such assessment is possible and appropriate. The Critical Appraisal Skills Programme (CASP) tool is the most commonly used tool for quality appraisal in health-related qualitative evidence syntheses, with endorsement from the Cochrane Qualitative and Implementation Methods Group. The tool is recommended for novice qualitative researchers, but there is little existing guidance on its application. This…