Table 3. Baseline characteristics of the patients.
ASA: American Society of Anesthesiologists; ERCP: endoscopic retrograde cholangiopancreatography
| Variables | Frequency | % |
| Age (Mean+SD) | 57.6±16.4 years | |
| Age group | ||
| <40 years | 25 | 23.8 |
| 40 years or more | 80 | 76.2 |
| Gender | ||
| Male | 61 | 58.1 |
| Female | 44 | 41.9 |
| ASA classification | ||
| I | 36 | 34.3 |
| II | 46 | 43.7 |
| III | 22 | 21.0 |
| IV or more | 1 | 1.0 |
| Primary diagnosis | ||
| Choledocholithiasis | 12 | 11.4 |
| Gall Bladder perforation | 3 | 2.9 |
| Cholecystitis | 47 | 44.8 |
| Biliary colic | 43 | 41.0 |
| Gallbladder wall thickness (Mean+SD) | 3.4±1.6 mm | |
| Gallbladder wall thickness | ||
| 3 mm or more | 54 | 51.4 |
| <3 mm | 51 | 48.6 |
| Common bile duct diameter (Mean+SD) | 4.8±2.2 mm | |
| Common bile duct diameter | ||
| >6 mm | 23 | 21.9 |
| 6 mm or less | 82 | 78.1 |
| Preoperative ERCP | ||
| Yes | 21 | 20.0 |
| No | 84 | 80.0 |
| Type of intervention | ||
| Emergency | 3 | 2.9 |
| Elective | 19 | 18.1 |
| Delayed | 83 | 79.0 |