Table 3.
Predictors of common bile duct stones in patients with acute cholecystitis undergoing magnetic resonance cholangiopancreaticography
| Clinical predictors | Sensitivity (%) | Specificity (%) | Likelihood ratio | PPV | NPV | p value |
|---|---|---|---|---|---|---|
| MR CBD size (n = 57) | 57 (20–94) | 80 (69–91) | 2.86 (1.22–6.67) | 29 | 93 | 0.0541 |
| U/S CBD size (n = 44) | 50 (10–90) | 82 (69–94) | 2.71 (0.96–7.70) | 30 | 91 | 0.1197 |
| AST (n = 56) | 57 (20–94) | 86 (76–96) | 4.00 (1.56–10.23) | 36 | 93 | 0.0223 |
| ALT (n = 57) | 86 (60–100) | 64 (51–77) | 2.38 (1.48–3.84) | 25 | 97 | 0.0343 |
| Total bilirubin (n = 57) | 43 (6–80) | 58 (44–72) | 1.02 (0.41–2.55) | 13 | 88 | 1 |
| Direct bilirubin (n = 26) | 80 (45–100) | 48 (26–69) | 1.53 (0.84–2.78) | 27 | 91 | 0.3562 |
| ALP (n = 56) | 67 (29–100) | 76 (64–88) | 2.78 (1.31–5.88) | 25 | 95 | 0.0494 |
| GGT (n = 34) | 83 (54–100) | 57 (39–75) | 1.94 (1.11–3.4) | 29 | 94 | 0.1748 |
Sensitivity, specificity, and likelihood ratio are given as a percentage, with the 95% confidence intervals (95% CIs) given in parentheses
PPV Positive predictive value, NPV negative predictive value