Table 2 Frequency of common bile duct (CBD) stones and relation with laboratory findings and choledocal diameter on preoperative ultrasound (US), chi-square (χ2) and p-value (p)
Laboratory and ultrasound findings | No. of patients | No. of patients with CBD stones | No. of patients without CBD stones | χ2; p |
|---|---|---|---|---|
AST or ALT | ||||
Normal AST or ALT | 87 | 5 (5.7%) | 82 (94.2%) | χ2 = 0.82; p = 0.36 |
Increased AST or ALT | 17 | 2 (11.8%) | 15 (88.2%) | |
ALP | ||||
Normal ALP | 18 | 1 (5.5%) | 17 (94.4%) | χ2 = 0.05; p = 0.83 |
Increased ALP | 86 | 6 (7%) | 80 (93%) | |
Total bilirubin | ||||
Normal bilirubin | 86 | 6 (7%) | 80 (93%) | χ2 = 0.05; p = 0.83 |
Increased bilirubin | 18 | 1 (5.6%) | 17 (94.4%) | |
Choledocal diameter on ultrasound | ||||
Normal (< 8 mm) | 99 | 6 (6%) | 93 (94%) | χ2 = 1.47; p = 0.23 |
Dilated (> 8 mm) | 5 | 1 (20%) | 4 (80%) | |