Table 4.
Interaction analysis of the different regions of Sweden and noise exposure levels on mortality from myocardial infarction and stroke of male construction workers with normal blood pressure adjusted for age, BMI and smoking habits
| Noise | Region | Myocardial infarction | Stroke | |||
|---|---|---|---|---|---|---|
| RR | 95% CI | RR | 95% CI | |||
| Main effects | ≤ 75 dB(A) (ref) | 1 | 1 | |||
| 76–85 dB(A) | 1.03 | 0.92–1.17 | 1.16 | 0.95–1.42 | ||
| > 85 dB(A) | 0.97 | 0.85–1.1 | 1.16 | 0.94–1.44 | ||
| Reference | 1 | 1 | ||||
| Colder | 0.89 | 0.76–1.03 | 0.98 | 0.76–1.28 | ||
| Coldest | 0.86 | 0.69–1.08 | 1.10 | 0.75–1.6 | ||
| Interaction | ≤ 75 dB(A) (ref) | Reference | 1 | 1 | ||
| Effects | 76–85 dB(A) | Colder | 1.07 | 0.90–1.28 | 1.00 | 0.75–1.35 |
| > 85 dB(A) | Colder | 1.28 | 1.06–1.54 | 1.02 | 0.74–1.4 | |
| 75–85 dB(A) | Coldest | 1.26 | 0.98–1.63 | 0.92 | 0.59–1.42 | |
| > 85 dB(A) | Coldest | 1.46 | 1.12–1.89 | 1.09 | 0.7–1.69 | |