| Variable | Males (46 Patients) | Females (118 Patients) | ||
| Number | Percentage | Number | Percentage | |
| Haematoma | 17 | 37% | 6 | 5.1% |
| Smokers | 31 | 67.4% | 4 | 3.4% |
| Non-Smokers | 15 | 32.6% | 114 | 96.6 |