A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term

Abstract Background Identifying populations with poor muscle recovery after total hip arthroplasty (THA) is important for postoperative physical therapy. Preoperative strength a strong factor that determines strength. However, this effect may depend on other factors. Thus, predictive models interaction terms are accurately predicting This study aimed to develop model lower 12 months THA which incorporates terms. Methods Subjects were female patients osteoarthritis who underwent unilateral THA. Patients locomotor disorders, neurological or complications excluded. Hip abductor and knee extensor measured, generalized linear approach preoperative strength, age, body weight, height, disease duration, activity, leg extension as explanatory variables was used identify factors determine Models between also examined. Results A of 82 analyzed. duration extracted significantly independently The term age identified Regression coefficients significant when +1 SD, but not -1 SD. Conclusions demonstrated determined by the being dependent age. When using it consider