Because all demographic and dependent variables of interest were similar at baseline, the improvements in pain intensity and health status in the exercise group at the conclusion of the 8-week intervention may be attributed to the hipstrengthening intervention. On average, the changes in pain and WOMAC postintervention were 6.4 and 43.3, respectively, for the exercise group, which far exceeded the minimal clinically important difference reported for both measures.9,13 The standardized response means associated with these changes were large (2.4 and 2.2 for the VAS and WOMAC, respectively), and, therefore, we are confident that the observed changes in the exercise group were clinically relevant