Measured hearing status by age group
| Hearing threshold; age group, yr | No. (%) of participants | ||
|---|---|---|---|
| Normal hearing (≤ 25 dB) | Mild loss (26–40 dB) | Moderate or worse loss (≥ 41 dB) | |
| Speech frequency | |||
| 20–39 | 27 (84) | 4 (12) | 1 (3) |
| 40–59 | 31 (65) | 11 (23) | 6 (12) |
| ≥ 60 | 3 (15) | 7 (35) | 10 (50) |
| High frequency | |||
| 20–39 | 25 (78) | 4 (12) | 3 (9) |
| 40–59 | 21 (44) | 17 (35) | 10 (21) |
| ≥ 60 | 3 (15) | 7 (35) | 10 (50) |