Construct Validity and Interrater Agreement of the Sport Injury Rehabilitation Adherence Scale

Context: Adherence to clinic-based rehabilitation might influence outcomes. Objective: To examine the construct validity and interrater agreement of a measure of adherence to clinic-based rehabilitation. Design: Repeated-measures in both study 1 and study 2. Participants: 43 student rehabilitation practitioners in study 1 and 12 patients undergoing rehabilitation after anterior cruciate ligament reconstruction in study 2. Interventions: Participants in study 1 rated the adherence of a simulated videotaped patient exhibiting high, moderate, and low adherence. Two certified athletic trainers rated the adherence of patients at 4 consecutive appointments in study 2. Main Outcome Measure: The Sport Injury Rehabilitation Adherence Scale. Results: In study 1, adherence ratings increased in a linear fashion across the 3 levels of adherence, and r WG(J) and rater-agreement-index values ranging from .84 to .95 were obtained. In study 2, the rater-agreement index was .94. Conclusions: Strong support was found for the construct validity and interrater agreement of the Sport Injury Rehabilitation Adherence Scale.