Associations between categories of combined exposure to baseline occupational noise and road traffic noise (1-year average) and overall stroke (n=71 628)
| Occupational noise | Road traffic noise, Lden | |||||
| Lden <55 dB | Lden 55–65 dB | Lden ≥65 dB | ||||
| N cases | HR (95% CI) | N cases | HR (95% CI) | N cases | HR (95% CI) | |
| <70 dB(A) | 1980 | Reference | 1512 | 1.01 (0.94 to 1.08) | 483 | 0.94 (0.85 to 1.04) |
| 70–74 dB(A) | 569 | 0.97 (0.88 to 1.06) | 483 | 0.94 (0.85 to 1.04) | 211 | 1.16 (1.00 to 1.34) |
| ≥75 dB(A) | 623 | 1.02 (0.93 to 1.12) | 474 | 0.97 (0.87 to 1.08) | 180 | 1.11 (0.95 to 1.29) |
*Adjusted for age, sex and calendar year at baseline (5-year period), educational level (low, medium, high), marital status (married/cohabiting, single), area-income (quartiles), smoking status (never, former, current) and physical activity (low, medium, high).
†All results are given as cases and HR (95% CI).