European Heart Journal Advance Access published online on January 23, 2008
European Heart Journal, doi:10.1093/eurheartj/ehm584
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Work stress and coronary heart disease: what are the mechanisms?
1 Department of Epidemiology and Public Health, University College London, 1-19 Torrington Place, London WC1E 6BT, UK
2 Department of Cardiac and Vascular Sciences, St George’s University of London, London, UK
Received 1 August 2007; revised 14 November 2007; accepted 22 November 2007.
* Corresponding author. Tel: +44 20 7679 5629, Fax: +44 20 7813 0242. Email: t.chandola{at}ucl.ac.uk
Aims: To determine the biological and behavioural factors linking work stress with coronary heart disease (CHD).
Methods and results: A total of 10 308 London-based male and female civil servants aged 35–55 at phase 1 (1985–88) of the Whitehall II study were studied. Exposures included work stress (assessed at phases 1 and 2), and outcomes included behavioural risk factors (phase 3), the metabolic syndrome (phase 3), heart rate variability, morning rise in cortisol (phase 7), and incident CHD (phases 2–7) on the basis of CHD death, non-fatal myocardial infarction, or definite angina. Chronic work stress was associated with CHD and this association was stronger among participants aged under 50 (RR 1.68, 95% CI 1.17–2.42). There were similar associations between work stress and low physical activity, poor diet, the metabolic syndrome, its components, and lower heart rate variability. Cross-sectionally, work stress was associated with a higher morning rise in cortisol. Around 32% of the effect of work stress on CHD was attributable to its effect on health behaviours and the metabolic syndrome.
Conclusion: Work stress may be an important determinant of CHD among working-age populations, which is mediated through indirect effects on health behaviours and direct effects on neuroendocrine stress pathways.
Key Words: Work stress • Autonomic nervous system • Myocardial infarction • Angina • Coronary heart disease • Psychosocial
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