Table 1.
Baseline characteristics and results
| Variable | Group 1(n = 113) | Group 2(n = 105) | P value |
| Age (yr) | 60.1 ± 9.7 | 57.9 ± 10.3 | 0.105 |
| Sex, male/female | 68/45 | 71/34 | 0.253 |
| Presence of gallstones (n) | 13 | 9 | 0.473 |
| History of cholecystectomy (n) | 7 | 9 | 0.501 |
| Total leukocyte count (× 109/L) | 5.8 ± 1.8 | 6.1 ± 2.1 | 0.259 |
| Amylase (U/L) | 88.5 ± 22.3 | 91.2 ± 24.5 | 0.396 |
| TB (mg/dL) | 4.6 ± 1.1 | 4.5 ± 1.0 | 0.482 |
| ALT (IU/L) | 124.8 ± 33.6 | 115.6 ± 36.1 | 0.052 |
| Aspartate aminotransferase (IU/L) | 98.6 ± 26.7 | 102.6 ± 33.4 | 0.088 |
| Prothrombin time (s) | 11.2 ± 2.1 | 11.1 ± 2.7 | 0.761 |
| Platelet count (× 106/L) | 145.2 ± 33.1 | 151.1 ± 31.2 | 0.176 |
| Maximum diameter of CBD (mm) | 12.5 ± 2.6 | 13.1 ± 2.7 | 0.095 |
Data are expressed as mean ± SD. TB: Total serum bilirubin; ALT: Alanine aminotransferase; CBD: Common bile duct.