Bilateral PCHI | Mild (20–39 dB HL) | 1.24 (1.02 to 1.46) | 0.302 (0.860) |
| Moderate (40–69 dB HL) | 0.78 (0.61 to 0.95) | 0.292 (0.864) |
| Severe (70–95 dB HL) | 0.38 (0.26 to 0.5) | 0.359 (0.836) |
| Profound (>95 dB HL) | 0.35 (0.23 to 0.47) | 0.125 (0.937) |
| Moderate and worse (>40 dB HL) | 1.51 (1.27 to 1.75) | 0.012 (0.994) |
| Total bilateral | 2.75 (2.42 to 3.07) | 0.144 (0.930) |
Unilateral PCHI | Mild and moderate (20–69 dB HL) | 0.44 (0.31 to 0.57) | 0.505 (0.777) |
| Severe and profound (>70 dB HL) | 0.59 (0.44 to 0.74)** | 10.35 (0.006)** |
| Total unilateral | 1.03 (0.83 to 1.23)* | 8.27 (0.016)* |
Total | | 3.78 (3.4 to 4.16) | 1.764 (0.414) |