Working Overtime Linked to Heart Disease
These results were for both women and men (ages 39-61) and the outcome measure was fatal myocardial infarction (heart attack) and non-fatal MI and proven angina. Other risk factors like smoking, elevated lipids, diabetes made no difference in the results.
The conclusion: "Overtime work is related to increased risk of incident coronary heart disease independently of conventional risk factors. These findings suggest that overtime work adversely affects coronary health".