Table 3. Efficacy of TUS and EUS in comparison with cholecystectomy and histology for gallbladder stones and ERCP for CBD stones were taken as the gold standard.

PPV: positive predictive value; NPV: negative predictive value; AUC: area under the curve; SD: standard deviation; CI: confidence interval; CBD: common bile duct; EUS: endoscopic ultrasound; TUS: transabdominal ultrasound.

Diagnostic modality		Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	AUC	SD	p-value	Asymptotic 95% CI
									Lower limit	Upper limit
Gallstones	EUS	98.8	100	100	98.8	0.494	0.05	0.906	0.392	0.596
	TUS	65.4	58	26.9	62.6	0.537	0.05	0.476	0.435	0.639
CBD stones	EUS	92.9	100	100	99.9	0.464	0.06	0.563	0.339	0.590
	TUS	39.3	66	53.6	47.9	0.366	0.06	0.03	0.249	0.484