Fig. 5From: Paraspinal muscle degeneration and lower bone mineral density as predictors of proximal junctional kyphosis in elderly patients with degenerative spinal diseases: a propensity score matched case–control analysisROC curve to find the optimum cut-off point of MF FI to predict postoperative PJK. AUC = 0.732 (95% CI, 0.654–0.809)Back to article page