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| Site A | Site B | |
|---|---|---|
| Exposed to noise ⩾85 dB(A) for at least a year | n (%) | n (%) |
| No | 9 (5%) | 27 (18%) |
| Yes | 177 (95%) | 123 (82%) |
| Exposed subjects only | Median (range) | Median (range) |
| M85 (dB(A)) | 89 (85–96) | 88 (85–93) |
| Years above 85 dB(A) | 13 (1–29) | 17 (1–35) |
| NIL85 | 100 (86–111) | 100 (87–106) |
