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Preoperative (baseline) and 3.6 year postoperative THR scores of SF-36 PF (physical function) for OA. The scale is 0–100, worst to best. Each line represents one patient (n=198). The blue line with triangle symbols represents the average scores for the patient group. The red line with circle symbols represents average scores for the SF-36 PF for the reference group (n=83).
