Fig. 4From: Association of global sagittal spinal deformity with functional disability two years after total hip arthroplastyA receiver-operating characteristic (ROC) curve to identify the cut-off value of the T1 pelvic angle divided by pelvic incidence for predicting disability at 2 years post-operatively. The area under the ROC curve was 0.88 (95% confidence interval, 0.850–0.952)Back to article page