Relative risks (RR) with 95% CI for myocardial infarction mortality in relation to cumulative exposure to whole body vibration (WBV) and hand/arm vibration (HAV), adjusted for dust exposure; RRs are shown for separate exposure categories and with respect to attained age
| Cumulative exposure categories | Attained age ≤ 60 years | Attained age > 60 years | Total | ||||||
| n | RR | 95% CI | n | RR | 95% CI | n | RR | 95% CI | |
| HAV | |||||||||
| Not exposed | 68 | 1 | — | 235 | 1 | — | 303 | 1 | — |
| Low | 134 | 1.06 | 0.78 to 1.43 | 302 | 0.94 | 0.78 to 1.12 | 436 | 0.94 | 0.81 to 1.10 |
| Medium | 110 | 1.68 | 1.21 to 2.32 | 272 | 0.89 | 0.74 to 1.07 | 382 | 1.07 | 0.91 to 1.25 |
| High | 59 | 1.31 | 0.87 to 1.98 | 297 | 0.89 | 0.74 to 1.08 | 356 | 0.99 | 0.83 to 1.18 |
| HAV>0 | 303 | 1.29 | 0.98 to 1.70 | 871 | 0.91 | 0.78 to 1.06 | 1174 | 1.00 | 0.87 to 1.14 |
| WBV | |||||||||
| Not exposed | 145 | 1 | — | 415 | 1 | — | 560 | 1 | — |
| Low | 79 | 1.20 | 0.89 to 1.61 | 204 | 0.97 | 0.81 to 1.16 | 283 | 1.04 | 0.89 to 1.21 |
| Medium | 82 | 1.40 | 1.03 to 1.91 | 280 | 1.11 | 0.94 to 1.32 | 362 | 1.21 | 1.04 to 1.40 |
| High | 65 | 1.29 | 0.91 to 1.83 | 207 | 1.02 | 0.85 to 1.23 | 272 | 1.13 | 0.96 to 1.33 |
| WBV>0 | 226 | 1.39 | 1.09 to 1.78 | 691 | 1.04 | 0.91 to 1.20 | 917 | 1.15 | 1.02 to 1.30 |
HAV: not exposed, low (>0–30 m/s2×years), medium (>30–80 m/s2×years) and high (>80 m/s2×years). WBV: not exposed, low (>0–2 m/s2×years), medium (>2–8 m/s2×years) and high (>8 m/s2×years).