Table showing critical appraisal assessment using the CASP tool.

CASP tool criteria.A - Was a clearly focused question stated?B - Was the study population clearly defined?C - Were all patients who entered the study fully accounted for at its conclusion?D - Was the assignment of treatment to patients randomised?E – Was each treatment group similar at the start of the study?F - Were the patients blinded to their treatment?G- Was the criteria for OA diagnosis clearly defined?H - Was the assessor defined?I - Was there appropriate analysis of results?J – Was there appropriate interpretation of results?K - Were the results applicable to clinical practice?