TABLE 3.
Multivariate Cox Proportional Hazards Models and 95% Confidence Intervals (CIs) for Acute Myocardial Infarction (MI) at Baseline and at 4-Year Follow-Up, by Levels of Work Characteristics: Still Working Study, Finland, January 1, 1987, to December 31, 2004
| Work Characteristic | Model 1,a Hazard Ratio (95% CI) | Model 2,b Hazard Ratio (95% CI) |
| Population at baseline | ||
| Skill discretion | 1.10 (0.98, 1.23) | 1.11 (0.98, 1.26) |
| Decision authority | 1.04 (0.93, 1.15) | 1.04 (0.93, 1.16) |
| Predictability | 1.13 (1.02, 1.26) | 1.13 (1.02, 1.26) |
| Population after 4 y | ||
| Skill discretion | 1.11 (0.99, 1.25) | 1.12 (0.98, 1.28) |
| Decision authority | 1.06 (0.95, 1.18) | 1.06 (0.94, 1.19) |
| Predictability | 1.13 (1.01, 1.27) | 1.13 (1.01, 1.26) |
Note. At baseline, sample number was 7663 and the number of acute MIs was 372. After 4 years, the sample number was 7580 and the number of acute MIs was 337. In this population, the follow-up was 1990–2004.
a
Adjusted for age, gender, marital status, prevalent hypertension, prevalent diabetes, psychological distress, smoking status, alcohol use, and physical activity at baseline.
b
Additionally adjusted for occupational status and educational attainment at baseline.