Comparison of the diagnostic efficiency between the O-RADS US risk stratification system and doctors’ subjective judgment

Table 4 The diagnostic accuracy of the two methods in predicting the malignant adnexal masses (n = 616)

Group	Method	Sens.	Spec.	PPV	NPV	AUC (95%CI)
Group I	Subjective judgment	81.0%	91.3%	74.4%	93.9%	0.86 (0.83–0.89)
Group I	O-RADS grading	91.2%	81.4%	60.6%	96.7%	0.86 (0.83–0.90)
Group II	Subjective judgment	70.1%	88.7%	66.0%	90.4%	0.79 (0.76–0.83)
Group II	O-RADS grading	84.4%	81.0%	58.2%	94.3%	0.83 (0.79–0.87)

Sens. sensitivity, Spec. specificity, PPV Positive predictive value, NPV Negative predictive value, AUC Area under receiver-operator characteristics curve, CI Confidence interval

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