Fig. 7From: Predictors of cartilage degeneration in patients with subchondral insufficiency fracture of the femoral head: a retrospective studyKaplan–Meier curves for the requirement of total hip arthroplasty. Kaplan–Meier curves for the requirement of total hip arthroplasty (THA) between a patients with and without intensity changes in the acetabulum and b patients in whom the band pattern ended and was under the edge of the acetabulum. AC, acetabulum; HR, hazard ratioBack to article page