Person-time, number of cases and incidence of hearing loss and its subentities
| Disease group | Occupational group | Person-time (in 100 000 person-years) | Cases (N) | Incidence (per 100 000 person-years) | IRR (95% CI) |
|---|---|---|---|---|---|
| Hearing loss | Musicians | 0.07 | 238 | 3621 | 1.27 (1.14 to 1.39) |
| Others | 99.11 | 283 459 | 2860 | 1 (Ref.) | |
| Noise-induced hearing loss | Musicians | 0.07 | 8 | 122 | 3.51 (2.82 to 4.21) |
| Others | 99.11 | 3433 | 35 | 1 (Ref.) | |
| Conductive hearing loss | Musicians | 0.07 | 12 | 183 | 1.12 (0.55;1.68) |
| Others | 99.11 | 16 193 | 163 | 1 (Ref.) | |
| Sensorineural hearing loss | Musicians | 0.07 | 42 | 639 | 0.91 (0.60 to 1.21) |
| Others | 99.11 | 69 945 | 706 | 1 (Ref.) | |
| Combined conductive and sensorineural hearing loss | Musicians | 0.07 | 2 | 30 | 0.51 (0.30 to 1.71) |
| Others | 99.11 | 5944 | 60 | 1 (Ref.) | |
| Tinnitus | Musicians | 0.07 | 148 | 2252 | 1.45 (1.29 to 1.61) |
| Others | 99.11 | 153 737 | 1551 | 1 (Ref.) |
IRR, incidence rate ratio.