Table 1.
Conversion rates relative to specific preoperative risk factors
| Preoperative risk factors | Risk factor positive no | Conversion no (%) | Risk factor negative no | Conversion nso (%) | p value | OR (95% CI) |
|---|---|---|---|---|---|---|
| Age ≥ 60 years | 1859 | 13 (0.7%) | 3879 | 15 (0.38%) | 0.154 | 1.814 (0.861, 3.20) |
| Male aged ≥ 60 years | 656 | 5 (0.76) | 830 | 5 (0.6%) | 0.757 | 1.267 (0.365, 4.396) |
| Emergency admission | 2551 | 19 (0.74%) | 3187 | 9 (0.28%) | 0.020 | 2.650 (1.197, 5.867) |
| Acute cholecystitis | 506 | 3 (0.6%) | 5232 | 25 (0.47%) | 0.733 | 1.242 (0.374, 4.129) |
| Jaundice | 1043 | 14 (1.3%) | 4695 | 14 (0.29%) | < 0.001 | 4.559 (2.162, 9.571) |
| Previous cholecystitis | 328 | 6 (1.8%) | 5410 | 22 (0.4%) | 0.004 | 4.577 (1.843, 11.367) |
| Previous jaundice | 304 | 2 (0.65%) | 5434 | 26 (0.48%) | 0.659 | 1.377 (0.325, 5.831) |
| USS thick or contracted GB | 872 | 7 (0.8%) | 4866 | 21 (0.43%) | 0.180 | 1.867 (0.791, 4.405) |
| USS Dilated CBD | 937 | 12 (1.28%) | 4801 | 16 (0.33%) | 0.001 | 3.880 (1.829, 8.228) |
| Previous abdominal surgery | 1759 | 5 (0.28%) | 3979 | 23 (0.57%) | 0.156 | 0.490 (0.186, 1.292) |
| Risk factors for CBD stones | 2047 | 19 (0.93%) | 3691 | 9 (0.24%) | 0.001 | 3.833 (1.731, 8.487) |