Figure 2.

Receiver operating characteristic (ROC) curve of PMCSA and PMT for prediction of PS. The best cut off point of PMT was 14.24 mm versus 611.67 mm² of PMCSA, with sensitivity 70.0% versus 75.0%, specificity 70.0% versus 75.0% and AUC 0.78 versus 0.81, respectively. PMCSA AUC (95% CI) = 0.81 (0.68–0.94); PMT AUC (95% CI) = 0.78 (0.63–0.93). AUC = area under the curve, PMT = piriformis muscle thickness, PMCSA = piriformis muscle cross-sectional area, PS = piriformis syndrome, ROC = receiver operating characteristic.