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%