Endometrial Volume Measured by VOCAL Compared to Office Hysteroscopy for Diagnosis of Endometrial Polyps in Premenopausal Women with Abnormal Uterine Bleeding

Table 5

Receiver-operating characteristic (ROC) curve analysis for the value of endometrial volume as estimated with VOCAL in discrimination between patients with or without hysteroscopically diagnosed endometrial polyps.

ROC index	Value	95% confidence interval
Area under the ROC curve (AUC)	0.604	0.506–0.696
statistic	1.881
value	0.060
Cut-off criterion	>1.2 mL
Youden index ()	0.324
Accuracy	64.2%
Sensitivity	90.0%	78.2%–96.7%
Specificity	42.4%	29.6%–55.9%
Positive likelihood ratio (+LR)	1.56	1.2–2.0
Negative likelihood ratio (−LR)	0.24	0.10–0.6
Positive predictive value (+PV)	57.0%	45.3%–68.1%
Negative predictive value (−PV)	83.3%	65.3%–94.4%

method.