Study population stratified by median age: hazard ratio and 95% CI for ischemic heart disease by level of work pressure*
| Work pressure | ||||
| Age | Number of cases | Suitable | A little too high | Much too high |
| HR (95% CI) | HR (95% CI) | |||
| <51 | 176 | 1 | 1.57 (1.09 to 2.25) | 1.94 (1.25 to 3.01) |
| ≥51 | 345 | 1 | 1.09 (0.77 to 1.55) | 0.97 (0.69 to 1.35) |
BMI, body mass index; HR, hazard ratio; IHD, ischemic heart disease.
↵* Adjusted for age in two groups for traditional risk factors for IHD: Family history of IHD, diabetes, menopausal status, BMI, smoking, alcohol, and leisure time physical activity as well as shift work and physical activity in work. We found no statistical interaction between work pressure and age (p=0.1968).