Table 2 Exposures in 1990 and relative risk (RR) and 95% confidence intervals (CI) for hospitalisation due to circulatory diseases (390–458, ICD‐8; I00–I99, ICD‐10), 1991–2002.
| Variable and level | n | RR | 95% CI |
|---|---|---|---|
| Shift work | |||
| Yes | 927 | 1.31 | 1.06–1.63 |
| No | 4528 | 1.00 | – |
| Annoying noise (⩾¼ of working hours) | |||
| Yes | 646 | 0.95 | 0.73–1.25 |
| No | 4809 | 1.00 | – |
| Coldness (⩾¼ of working hours) | |||
| Yes | 1058 | 0.98 | 0.79–1.23 |
| No | 4397 | 1.00 | – |
| Conflicts at work | |||
| Yes | 2166 | 1.16 | 0.97–1.38 |
| No | 3289 | 1.00 | – |
| High cognitive demands | |||
| Yes | 1271 | 1.11 | 0.92–1.34 |
| No | 4184 | 1.00 | – |
| Many ergonomic exposures | |||
| Yes | 1299 | 1.25 | 1.00–1.56 |
| No | 4156 | 1.00 | – |
| Job insecurity | |||
| Yes | 1428 | 1.25 | 1.05–1.50 |
| No | 4027 | 1.00 | – |
| Passive smoking (⩾¼ of working hours) | |||
| Yes | 1656 | 1.03 | 0.86–1.25 |
| No | 3799 | 1.00 | – |
| Monotonous repetitive tasks (⩾½ of working hours) | |||
| Yes | 1992 | 0.92 | 0.76–1.11 |
| No | 3463 | 1.00 | – |
| Low decision authority | |||
| Yes | 1268 | 0.90 | 0.72–1.11 |
| No | 4187 | 1.00 | – |
| Heat (⩾¼ of working hours) | |||
| Yes | 562 | 0.89 | 0.67–1.19 |
| No | 4893 | 1.00 | – |
| Walking or standing at work (almost all the time) | |||
| Yes | 2029 | 1.14 | 0.94–1.38 |
| No | 3426 | 1.00 | – |
| Low social support | |||
| Yes | 1429 | 0.99 | 0.82–1.19 |
| No | 4026 | 1.00 | – |
| Baseline BMI | |||
| BMI<20 | 690 | 0.63 | 0.41–0.96 |
| 20⩽BMI<25 | 3261 | 0.70 | 0.50–0.97 |
| 25⩽BMI<30 | 1262 | 0.77 | 0.55–1.09 |
| BMI⩾30 | 242 | 1.00 | – |
| Smoking status | |||
| Never smoker | 1940 | 0.97 | 0.78–1.21 |
| Ex‐smoker | 966 | 0.92 | 0.71–1.17 |
| Current smoker (<15 g/day) | 1114 | 1.08 | 0.85–1.37 |
| Current smoker (⩾15 g/day) | 1435 | 1.00 | – |