Appropriate Patient Selection in the Management of Common Bile Duct Stones: When Not to Do ERCP

Table 2

Biochemical findings as separate risk factors for the presence of CBD stones.

Risk factor	Odds ratio	95% C.I.	Sensitivity	Specificity
Bilirubin	1.10	0.38–3.22	58%	83%
ALT > normal	13.7	1.57–120	96%	65%
ALP > normal	7.2	1.97–26.3	83%	82%