Table 2.

Diagnostic efficiency of conventional ultrasound and contrast-enhanced ultrasound between benign and malignant gallbladder lesions n (%)

Features of lesions	Sensitivity	Specificity	Positive predictive value	Negative predictive value	Accuracy
Conventional ultrasound	82.4	89.8	60.9	96.3	88.6
Contrast-enhanced ultrasound	94.1	95.5	80.0	98.8	95.2
P value	0.301	0.124	0.152	0.297	0.064