| Timing of operation | Frequency (n = 98) | |
| N | % | |
| within 6 hours | 3 | 3.06 |
| within 6 - 24 hours | 65 | 66.32 |
| within 24 - 72 hours | 25 | 25.50 |
| >72 hour | 5 | 5.10 |
| Total | 98 | 100.0 |