Total Hip Replacement or Resistance Training for Severe Hip Osteoarthritis

BACKGROUND: Total hip replacement is routinely recommended for severe hip osteoarthritis, but data from randomized trials are lacking regarding comparison of the effectiveness of this procedure with that of nonsurgical treatment such as resistance training. METHODS: We conducted a multicenter, randomized, controlled trial to compare total hip replacement with resistance training in patients 50 years of age or older who had severe hip osteoarthritis and an indication for surgery. The primary outcome was the change in patient-reported hip pain and function from baseline to 6 months after the initiation of treatment, assessed with the use of the Oxford Hip Score (range, 0 to 48, with higher scores indicating less pain and better function). Safety was also assessed. RESULTS: A total of 109 patients (mean age, 67.6 years) were randomly assigned to total hip replacement (53 patients) or resistance training (56 patients). In an intention-to-treat analysis, the mean increase (indicating improvement) in the Oxford Hip Score was 15.9 points in patients assigned to total hip replacement and 4.5 points in patients assigned to resistance training (difference, 11.4 points; 95% confidence interval, 8.9 to 14.0; P<0.001). At 6 months, 5 patients (9%) who had been assigned to total hip replacement had not undergone surgery, and 12 patients (21%) who had been assigned to resistance training had undergone total hip replacement. The incidence of serious adverse events at 6 months was similar in the two groups; the majority of such events were known complications of total hip replacement. CONCLUSIONS: In patients 50 years of age or older who had severe hip osteoarthritis and an indication for surgery, total hip replacement resulted in a clinically important, superior reduction in hip pain and improved hip function, as reported by patients, at 6 months as compared with resistance training. (Funded by the Danish Rheumatism Association and others; PROHIP ClinicalTrials.gov number, NCT04070027.).