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VOLUME 34, ISSUE 11

SLEEP DURATION, SLEEP QUALITY, AND CARDIOVASCULAR DISEASE INCIDENCE
Sleep Duration and Sleep Quality in Relation to 12-Year Cardiovascular Disease Incidence: The MORGEN Study

http://dx.doi.org/10.5665/sleep.1382

Marieke P. Hoevenaar-Blom, MSc1,2; Annemieke M.W. Spijkerman, PhD1; Daan Kromhout, MPH, PhD2; Julia F. van den Berg, PhD3; W.M. Monique Verschuren, PhD1

1Centre for Prevention and Health Services Research, National Institute for Public Health and the Environment, Bilthoven, The Netherlands; 2Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; 3Parnassia, The Hague, The Netherlands



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Study Objectives:

We studied sleep duration and sleep quality in relation to cardiovascular disease (CVD) incidence.

Design/Setting:

Dutch population-based cohort study.

Participants:

20,432 men and women aged 20-65 y with no history of CVD.

Interventions:

N/A

Measurements:

Sleep duration and sleep quality were assessed by a self-administered questionnaire. Morbidity data, vital status, and causes of death were obtained through linkage with several national registries. Hazard ratios (HRs) and 95% confidence intervals (95% CIs) were calculated using Cox proportional hazards models.

Results:

During 10-15 years of follow-up, 1,486 CVD and 1,148 coronary heart disease (CHD) events occurred. Short sleepers (≤ 6 h) had a 15% higher risk of total CVD (HR: 1.15; 95%CI: 1.00-1.32) and a 23% higher risk of CHD (HR: 1.23 [1.04-1.45]) compared to normal sleepers (7 h) after adjustment for all confounders. Additional adjustment for intermediate biological risk factors attenuated these relative risks to 1.11 (0.97-1.27) for total CVD and to 1.19 (1.00-1.40) for CHD. Short sleepers with poor sleep quality had a 63% higher risk of CVD (HR: 1.63 [1.21-2.19]) and a 79% higher risk of CHD incidence (HR: 1.79 [1.24-2.58]) compared to normal sleepers with good sleep quality, after adjustments for all confounders. We observed no associations between long sleep duration (≥ 9 h) and CVD or CHD incidence.

Conclusions:

Short sleepers, especially those with poor sleep quality, have an increased risk of total CVD and CHD incidence. Future investigations should not only focus on sleep duration, but should also take sleep quality into account.

Citation:

Hoevenaar-Blom MP; Spijkerman AMW; Kromhout D; van den Berg JF; Verschuren WMM. Sleep duration and sleep quality in relation to 12-year cardiovascular disease incidence: the MORGEN Study. SLEEP 2011;34(11):1487-1492.

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