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

Table 4

Receiver-operating characteristic (ROC) curve analysis for the value of endometrial thickness as estimated with 2D TVUS in differentiating between patients with or without hysteroscopically diagnosed endometrial polyps.

(a)

Variable	Value
Sample size	109
Endometrial polyp by hysteroscopy	50 (45.87%)
No endometrial polyp by hysteroscopy	59 (54.13%)
Disease prevalence	45.9%

(b)

ROC index	Value	95% confidence interval
Area under the ROC curve (AUC)	0.568	0.470 to 0.663
statistic	1.229
value	0.219
Cut-off criterion	>7.5 mm
Youden index ()	0.1929
Accuracy	57.8%
Sensitivity	82.0%	68.6%–91.4%
Specificity	37.3%	25.0%–50.9%
Positive likelihood ratio (+LR)	1.3	1.0–1.7
Negative likelihood ratio (−LR)	0.5	0.2–1.0
Positive predictive value (+PV)	52.6%	40.9%–64.0%
Negative predictive value (−PV)	71.0%	52.0%–85.9%

method.