Fig. 3From: Free testosterone value before radical prostatectomy is related to oncologic outcomes and post-operative erectile functionROC curves in predicting erectile function by free testosterone value (a predicting IIEF-5 over 17 points, AUC = 0.634; b predicting IIEF-5 over 12 points, AUC = 0.782). ROC = receiver operating characteristic; AUC = area under curveNote: since higher free testosterone value was related to better erectile function, the ROC curves are showing the prediction of having the ability for sexual life, NOT the occurrence of ED.Back to article page