From: Relationship of cigarette smoking and hearing loss in workers exposed to occupational noise
 | 1 kHz * | 2 kHz * | 3 kHz * | 4 kHz * | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
 | N | OR †| 95% CI | N | OR †| 95% CI | N | OR †| 95% CI | N | OR †| 95% CI |
Smoking amount (pack-years) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
0.05-9.9 | 1,125 | 1.000 | Â | 1,125 | 1.000 | Â | 1,125 | 1.000 | Â | 1,125 | 1.000 | Â |
10-19.9 | 1,413 | 1.562 | 1.013–2.408 | 1,413 | 1.420 | 1.014–1.988 | 1,413 | 1.063 | 0.811–1.393 | 1,413 | 1.034 | 0.815–1.312 |
20-29.9 | 689 | 1.557 | 0.990–2.450 | 689 | 1.673 | 1.179–2.374 | 689 | 1.198 | 0.898–1.599 | 689 | 1.228 | 0.945–1.595 |
≥30 | 366 | 1.643 | 1.023–2.640 | 366 | 1.660 | 1.143–2.411 | 366 | 1.264 | 0.918–1.742 | 366 | 1.060 | 0.779–1.442 |
p for trend | Â | 0.263 | Â | Â | 0.197 | Â | Â | 0.314 | Â | Â | 0.387 | Â |