| Characteristic | Number (percent) |
| Sex |
|
| Male | 50 (42.4%) |
| Female | 68 (57.6%) |
| Patient age |
|
| <10 years | 7 (5.9%) |
| ³10 years | 111 (94.1%) |
| Side |
|
| Right | 58 (50.0%) |
| Left | 58 (50.0%) |
| Laterally |
|
| Bilateral | 25 (21.2%) |
| Unilteral | 93 (79.8%) |
| Size of perforation |
|
| | 18 (15.2%) |
| ≥three quarters | 100 (84.2%) |
| Gelform in middle ear space |
|
| Yes | 46 (39.0%) |
| No | 72 (61.0%) |
| Otorrhea at surgery |
|
| Discharge | 10 (8.5%) |
| Dry | 108 (91.5%) |
| Chitin membrane |
|
| Yes | 104 (88.1%) |
| No | 14 (11.9%) |
| MRSA-infected |
|
| Yes | 9 (7.6%) |
| No | 109 (92.4%) |