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Kaplan-Meier survival curve, stratified according to whether accompanied with bone marrow edema shows the estimated survival rates were 85.71% at 60 months for hips not accompanied with bone marrow edema (95% CI, 43.44% to 80.48%) and 67.37% at 60 months for hips accompanied with bone marrow edema (95% CI, 33.41% to 97.86%) (= 7.429, P = 0.006).
