Associations between sleep duration and abnormal serum lipid levels: data from the Korean National Health and Nutrition Examination Survey (KNHANES) |
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| Affiliation: | 1. Department of Biomedical Science, Chonnam National University Medical School, Gwangju, Republic of Korea;2. Division of Clinical Pharmacology, Chonnam National University Hospital, Gwangju, Republic of Korea;3. Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea;1. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA;2. Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas School of Public Health, Houston, TX, USA;3. Department of Management, Policy and Community Health, The University of Texas School of Public Health, Houston, TX, USA;4. USDA/ARS Children''s Nutrition Research Center, Baylor College of Medicine, Houston, TX, USA;1. Department of Biomedical Science and Technology, College of Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul, Republic of Korea;2. Department of Preventive Medicine, Gachon University College of Medicine, Incheon, Republic of Korea;3. Department of Family Medicine, College of Medicine, Kyung Hee University, Seoul, Republic of Korea |
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| Abstract: | BackgroundShorter or longer sleep duration has been reported to be associated with abnormal serum lipid levels, but the findings have been inconsistent. This study examined associations between sleep duration and abnormal serum lipid levels in a Korean adult population.MethodsThis study used the data of 13,609 people aged ≥20 years from the Korean National Health and Nutrition Examination Survey (KNHANES) in 2010–2012. Sleep duration was classified into five groups: ≤5, 6, 7 (reference category), 8, and ≥9 hours. The serum concentrations of total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), and triglyceride were measured and defined in terms of abnormal serum lipid levels. Multiple logistic regressions were performed to determine the associations between sleep duration and abnormal serum lipid levels. The covariates included age, sex, education, marital status, current smoking, alcohol consumption, physical activity, body mass index, hypertension, diabetes, depressive symptoms, and stress level.ResultsSelf-reported sleep duration of ≤5 hours was significantly associated with high TC and high LDL-C levels in unadjusted models, but after adjusting for age and sex, the statistical significance disappeared. On the other hand, after adjusting for covariates, self-reported sleep duration of ≥9 h was significantly associated with low HDL-C levels (odds ratio = 1.30; 95% confidence interval = 1.09–1.54).ConclusionsThese findings suggest that longer sleep duration is associated with low HDL-C levels among Korean adults. |
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