Fig. 5From: 10-year follow-up results of the prospective, double-blinded, randomized, controlled study on autologous bone marrow buffy coat grafting combined with core decompression in patients with avascular necrosis of the femoral headUnivariate (a) and multivariate (b) Cox proportional hazards regression analysis. The forest plot of hazard ratio showed the proportional risk. BBC bone marrow buffy coat, HR hazard ratio, CI confidence intervalBack to article page