Table 4.
Clinical predictors: unadjusted odds of choledocholithiasis.
| Predictors | Odds ratio (OR) | Lower 95% CL | Upper 95% CL | p value |
|---|---|---|---|---|
| Unadjusted odds | ||||
| Very strong predictors | ||||
| Common bile duct stone on ultrasound | 6.65 | 2.57 | 17.18 | <.0001 |
| Clinical ascending cholangitis | 3.88 | 1.30 | 11.58 | 0.015 |
| Total bilirubin > 4 mg/dL | 2.67 | 1.80 | 3.97 | <.0001 |
| Strong predictors | ||||
| Dilated common bile duct on ultrasound | 2.19 | 1.54 | 3.12 | <.0001 |
| Total bilirubin, 1.8–4 mg/dL | 0.88 | 0.61 | 1.27 | 0.483 |
| Moderate predictors | ||||
| Abnormal liver function test | 2.88 | 1.15 | 7.18 | 0.023 |
| Age > 55 years old | 1.38 | 0.86 | 2.23 | 0.181 |
| Gallstone pancreatitis | 0.63 | 0.42 | 0.94 | 0.022 |
| Multivariate odds | ||||
| Common bile duct stone on ultrasound | 5.40 | 2.04 | 14.30 | 0.0179 |
| Clinical ascending cholangitis | 2.82 | 0.90 | 8.8 | 0.0007 |
| Total bilirubin > 4 mg/dL | 2.46 | 1.62 | 3.73 | <.0001 |
| Dilated common bile duct on ultrasound | 1.56 | 1.05 | 2.34 | 0.029 |
CBD, common bile duct; US, ultrasound; LFT, liver function test.