Table 4.
Unadjusted all injury and serious injury rates per 100 person-years by noise exposure and hearing threshold level, 2003–2008. [dBA=A-weighted decibels; dB=decibel]
| All acute injury
|
Seriousa acute injury
|
|||
|---|---|---|---|---|
| N | Rate | N | Rate | |
|
|
||||
| Total | 5566 | 16.71 | 1289 | 3.87 |
| Mean noise exposure (dBA) | ||||
| <82 | 2674 | 16.39 | 543 | 3.33 |
| 82–84.99 | 1189 | 14.82 | 299 | 3.73 |
| 85–87.99 | 1327 | 19.62 | 314 | 4.64 |
| ≥88 | 376 | 17.07 | 133 | 6.04 |
| Hearing threshold level (dB) | ||||
| <10 | 2723 | 17.30 | 628 | 3.99 |
| 10–24.99 | 2218 | 15.91 | 524 | 3.76 |
| ≥25 | 625 | 17.25 | 137 | 3.78 |
a
Resulting in medical treatment, work restrictions, or lost work time.