| Variables | Frequency (N = 13) | Percentage (%) |
| Penile surgery | ||
| Yes | 2 | 15.4 |
| No | 11 | 84.6 |
| Comorbidities | ||
| None | 2 | 15.4 |
| Sicke cell disease | 10 | 76.9 |
| Pelvic tumor | 1 | 7.7 |
| Toxicology | ||
| narcotics | 5 | 38.5 |