| EPA thresholds | Left ear Number (%) | Right ear Number (%) | ||
| Asymmetric impairments (N = 2) | ||||
| Moderate: V-wave threshold: 40 - 69 dB | 1 (7.1) | 0 | ||
| Severe: V-wave threshold: 71 - 95 dB | 1 (7.1) | 0 | ||
| Profound > 95 dB | 0 | 2 (14.3) | ||
| Symmetrical impairments (N = 12) | ||||
| Severe: V-wave threshold: 71 - 95 dB | 1 (7.1) | 1 (7.1) | ||
| Deep > 95 dB | 11 (78.6) | 11 (78.6) | ||