Fig. 1From: The clinical utility curve: a proposal to improve the translation of information provided by prediction models to cliniciansROC curves (a) and CU curves (b) for the prediction of malignancy (combined malignancy and borderline histology) in 37 women with adnexal masses. Solid line represents model 1 and dashed line represents model 2. NNCOC number of surgical biopsies needed to capture one case of malignancy. C statistics were 0.839 (95 % CI 0.697–0.947) for model 1 and 0.877 (0.753–0.968) for model 2, P = 0.003. Sensitivities of 80, 87, 93 and 100 % were achieved at absolute risks of 38, 36, 32 and 3.7 %, respectively, for model 1, and 64, 30, 12 and 6 %, respectively for model 2. Model 1 identified all 15 malignancies in 35 patients, with an NNCOC of 2.3, whereas model 2 identified all 15 malignancies in 30 patients, with an NNCOC of 2Back to article page