Fig. 5From: Decreased serum MMP-9 levels in patients with nontraumatic osteonecrosis of the femoral headA ROC curve analysis of serum MMP-9 levels with regard to FICAT 1 vs. FICAT 2. B ROC curve analysis of serum MMP-9 levels with regard to FICAT 2 vs. FICAT 3. C ROC curve analysis of serum MMP-9 levels with regard to FICAT 3 vs. FICAT 4Back to article page