| Operating time/hospitalization duration and post-op complications | Effective | Frequency | |
| Duration of surgical intervention | <1 hour | 150 | 75 |
| 1 hour - 1 hour 30 minutes | 11 | 5.50 | |
| >1 hour 30 minutes | 27 | 13.50 | |
| Undetermined | 12 | 6 | |
| Length of hospitalization | 0 - 3 days | 171 | 85.50 |
| 4 - 7 days | 29 | 14.50 | |
| Postoperative complications | Death | 1 | 0.50 |
| Digestive fistulas | 1 | 0.50 | |
| Surgical site infection | 6 | 3 | |
| None | 192 | 96 | |
| Total | 200 | 100 | |