Causal pathology | Effective | Percentage (%) |
Simple CMO with open tympanum | 120 | 52.17 |
atelectatic otitis | 35 | 15.21 |
cholesteatomatous CMO | 26 | 11.30 |
Tympanosclerosis | 11 | 4.78 |
Presbycusis | 10 | 4.34 |
Otosclerosis | 9 | 3.91 |
Chronic sound trauma | 8 | 3.47 |
Acute sound trauma | 6 | 2.60 |
External auditory meatus stenosis | 3 | 1.30 |
rock fracture | 2 | 0.86 |
Total | 230 | 100 |