Sociodemographic variables, coronary risk factors, indicators of job stress, and myocardial infarction (men and women aged 45–64 years) (percentage of exposed (valid numbers/missing data) or mean (SD) value (valid numbers/missing data) in cases and referents)
| Cases (n=951) | Referents (n=1147) | |
|---|---|---|
| Age (y) | 55.8 (5.5) (951/0) | 55.9 (5.5) (1147/0) |
| Gender (male) | 74.7% (710/0) | 73.1% (838/0) |
| Education (<12 years) | 72.6 (681/13) | 64.0% (728/ 9) |
| Socioeconomic group (blue collar) | 35.9% (258/232) | 24.3% (224/227) |
| Systolic blood pressure (mm Hg) | 128.4 (18.8) (837/114) | 136.9 (20.1) (1021/126) |
| Diastolic blood pressure (mm Hg) | 79.8 (10.1) (838/113) | 83.9 (10.7) (1020/127) |
| Total cholesterol (mg/dl) | 240.1 (45.8) (836/115) | 227.3 (39.6) (1019/128) |
| LDL-cholesterol (mg/dl) | 163.6 (39.4) (805/146) | 153.1 (37.0) (1009/138) |
| HDL-cholesterol (mmol /l) | 1.1 (0.3) (824/127) | 1.3 (0.4) (1011/136) |
| Body weight (kg/ m2) | 27.0 (4.0) (833/118) | 25.8 (3.8) (1019/128) |
| Cigarette smoking (mean number/day) | 11.5 (9.1) (951/0) | 6.7 (7.6) (1047/0) |
| Hypertension (yes) | 36.7% (322/114) | 30.3% (318/127) |
| Smoking status: | ||
| current | 59.2% (563/0) | 31.4% (360/0) |
| former | 22.8% (217/0) | 31.4% (360/0) |
| never | 18.0% (171/0) | 37.2% (427/0) |
| Family history of CHD (yes) | 53.3% (507/0) | 38.5% (442/0) |
| Diabetes (yes) | 14.2% (134/5) | 3.9% (45/3) |
| Lack of physical exercise (<1/week) | 73.5% (697/3) | 62.3% (712/4) |
| Effort-reward imbalance | ||
| effort-reward-ratio (>1) | 21.1% (192/40) | 16.8% (186/37) |
| overcommitment (upper tertile) | 35.0% (314/54) | 26.9% (296/47) |
| Job strain (upper quartile) | 35.4% (324/35) | 27.2% (307/20) |
| Simultaneous exposure to job strain and to effort-reward imbalance | ||
| Job strain present and effort-reward-ratio >1 | 12.8% (115/55) | 8.7% (96/46) |
| Job strain present and overcommitment present (upper tertile) | 16.2% (142/74) | 10.9% (119/59) |