Fig. 3From: Decreased serum MMP-9 levels in patients with nontraumatic osteonecrosis of the femoral headA Comparison of serum MMP-9 and TIMP-1 levels among different FICAT stages. B Correlation of serum MMP-9 levels with FICAT grade. C Correlation of MMP-9/TIMP-1 ratio with FICAT grade. NS, p > 0.05; *p < 0.05Back to article page