| Acoustic reflex | Right ear | Left ear | ||
| *RA group N (%) | Non-RA group N (%) | RA group N (%) | Non-RA group N (%) | |
| Present | 48 (72.7) | 36 (87.8) | 48 (72.7) | 36 (87.8) |
| Impaired | 17 (25.8) | 2 (12.3) | 17 (25.8) | 2 (12.3) |
| Absent | 1 (1.5) | 0 (0) | 1 (1.5) | 0 (0) |
| Total | 66 (100.0) | 41 (100) | 66 (100.0) | 41 (100) |