Table III.
Cochlear and vestibular data.
| Vertigo | Imbalance | Mean PTA in decibel | Class of Hearing function | Class of vestibular function | UW% | Hypervent | |
|---|---|---|---|---|---|---|---|
| Koos 1 (n = 11) | 5 (45%) | 5 (45%) | 49 ± 27 | A = 4 B = 1 C = 4 D = 2 |
A = 1 B = 3 C = 6 D = 1 |
52 ± 21 | 9 (82%) |
| Koos 2 (n = 8) | 3 (37%) | 4 (50%) | 25 ± 13 | A = 5 B = 2 C = 1 |
A = 4 B = 4 |
29 ± 14 | 4 (50%) |
| Koos 3A (n =15) |
4 (27%) | 3 (20%) | 60 ± 30 | A = 3 B = 6 C = 3 D = 3 |
A = 2 B = 5 C = 4 D = 4 |
46 ± 27 | 11 (73%) |
| Koos 3B (n = 20) |
6 (30%) | 9 (45%) | 57 ± 35 | A = 4 B = 6 C = 6 D = 4 |
A = 2 B = 9 C = 5 D = 4 |
49 ± 25 | 16 (80%) |
| Koos 4A (n = 10) |
1 (10%) | 5 (50%) | 55 ± 34 | A = 2 B = 3 C = 3 D = 2 |
A = 1 B = 6 C = 1 D = 2 |
47 ± 30 | 7 (70%) |
PTA = Pure tone average, UW = unilateral weakness.