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No of cases (%) with middle ear abnormalities observed on otoscopy (categories are not mutually exclusive)
| Ears affected | Middle ear effusion | Perforated ear drum (active or inactive) | Grommet/T tube in situ (patent or blocked) | Tympanic membrane retraction | Cholesteatoma |
|---|---|---|---|---|---|
| One ear | 24 (10.6%) | 5 (2%) | 36 (15.9%) | 15 (6.6%) | 0 (0%) |
| Both ears | 24 (10.6%) | 1 (0.4%) | 23 (10.1%) | 12 (5.3%) | 0 (0%) |
| Either ear | 48 (21%) | 6 (2.6%) | 59 (26%) | 27 (12%) | 0 (0%) |
