Table 5.
Tympanometry results showing the function of the middle ear [results shown by child (%)]
| Left ear | |||||
|---|---|---|---|---|---|
| Type A | Type B | Type C | Missing | ||
| Right ear | Type A | 41 (18%) | 12 (5%) | 16 (7%) | 1 (0.4%) |
| Type B | 9 (4%) | 61 (27%) | 8 (3.5%) | 5 (2.2%) | |
| Type C | 11 (5%) | 9 (4%) | 16 (7%) | 1 (0.4%) | |
| Missing data | 1 (0.4%) | 4 (2%) | 1 (0.4%) | 31 (14%) | |
Type A: Normal peaked tympanogram (−150 to 50 daPa) indicates normal middle ear function; type B: flat tympanogram indicates reduced compliance of tympanic membrane; type C: tympanogram with negative middle ear pressure <−150 daPa.