Key result
Working 3-4 hours of daily overtime is linked to ~56% greater incident CHD risk versus no overtime.
Why the study?
The association between overtime work and incident coronary heart disease among middle-aged employees was unclear.
Does 3-4 hours of overtime work per day increase the risk of incident coronary heart disease in middle-aged employees?
Cohort (n=6,014)
Does 3-4 hours of overtime work per day increase the risk of incident coronary heart disease in middle-aged employees?
Hazard Ratio: 1.56 (95% CI 1.11–2.19)
Working 3-4 hours of overtime per day is associated with a significantly increased risk of incident coronary heart disease, independent of conventional cardiovascular risk factors.
No takes yet. Share an insight, caveat, or question.
Overtime may flag higher CHD risk but should not change practice; leaves open need for prospective confirmation.
Virtanen et al. (2010) conducted a cohort in Coronary heart disease (n=6,014). 3-4 hours overtime work per day vs. No overtime work was evaluated on Incident fatal CHD, clinically verified incident non-fatal myocardial infarction (MI), or definite angina (HR 1.56, 95% CI 1.11-2.19). Working 3-4 hours of overtime per day was associated with an increased risk of incident coronary heart disease compared with no overtime work (HR 1.56; 95% CI 1.11-2.19).
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