Lack of sleep may explain why poor people get more heart disease 睡眠不足可能解释了为什么穷人会得更多心脏病

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EUROPEAN SOCIETY OF CARDIOLOGY

Sophia Antipolis, 22 November 2019: Insufficient sleep is one reason why disadvantaged groups have more heart disease. That’s the finding of a study published today in Cardiovascular Research, a journal of the European Society of Cardiology (ESC).1

People with lower socioeconomic status sleep less for a variety of reasons: they may do several jobs, work in shifts, live in noisy environments, and have greater levels of emotional and financial stress.

This was the first large population-based study to examine whether lack of sleep could partly explain why poor people have more heart disease. It found that short sleep explained 13.4% of the link between occupation and coronary heart disease in men.

Study author Dusan Petrovic, of the University Centre of General Medicine and Public Health (unisanté), Lausanne, Switzerland, said: “The absence of mediation by short sleep in women could be due to the weaker relationship between occupation and sleep duration compared to men.”

“Women with low socioeconomic status often combine the physical and psychosocial strain of manual, poorly paid jobs with household responsibilities and stress, which negatively affects sleep and its health-restoring effects compared to men,” he said.

He said: “Structural reforms are needed at every level of society to enable people to get more sleep. For example, attempting to reduce noise, which is an important source of sleep disturbances, with double glazed windows, limiting traffic, and not building houses next to airports or highways.”

The study was part of the Lifepath project, and pooled data from eight cohorts totalling 111,205 participants from four European countries. Socioeconomic status was classified as low, middle, or high according to father’s occupation and personal occupation. History of coronary heart disease and stroke was obtained from clinical assessment, medical records, and self-report. Average sleep duration was self-reported and categorised as recommended or normal sleep (6 to 8.5), short sleep (6), and long sleep (more than 8.5) hours per night.

The contribution of insufficient sleep was investigated using a statistical approach called mediation analysis. It estimates the contribution of an intermediate factor (sleep) to an association between the main exposure (socioeconomic status) and the main outcome (coronary heart disease or stroke).

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Authors: ESC Press Office
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Funding: Please see the paper for a list of funding sources.

Disclosures: None.

Notes

References

1Petrovic D, Haba-Rubio J, de Mestral Vargas C, et al. The contribution of sleep to social inequalities in cardiovascular disorders: a multi-cohort study. Cardiovasc Res. 2019. https://academic.oup.com/cardiovascres/article-lookup/doi/10.1093/cvr/cvz267

About the European Society of Cardiology

The European Society of Cardiology brings together health care professionals from more than 150 countries, working to advance cardiovascular medicine and help people lead longer, healthier lives.

About Cardiovascular Research

Cardiovascular Research (CVR) is the international journal of the European Society of Cardiology (ESC) for basic and translational research across different disciplines and areas.

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