Figure 5: Dynamic pudendal somatosensory evoked potential studies had 77.78% sensitivity and 93.75% specificity with a Youden index of 0.7153 and pudendal magnetic resonance imaging had 33.3% sensitivity and 75% specificity with a Youden index of 0.0833 on the receiver operating characteristics analyses performed by accepting the clinical diagnoses based on Nantes criteria as a gold standard