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Sex, Sleep Duration, and the Association of Cognition: Findings from the China Health and Retirement Longitudinal Study

Author

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  • Wei Li

    (Department of Epidemiology, Robert Stempel College of Public Health, Florida International University, Miami, FL 33199, USA)

  • Ning Sun

    (Department of Epidemiology, Robert Stempel College of Public Health, Florida International University, Miami, FL 33199, USA)

  • Anthony Kondracki

    (Department of Community Medicine, School of Medicine, Mercer University, Savannah, GA 31404, USA)

  • Wenjie Sun

    (School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA)

Abstract

Background: We aimed to examine the association between sleep duration and cognitive impairment among elderly Chinese people. Methods: generalized linear modeling was used to analyze the baseline data for adults aged 65 years and over ( n = 4785) selected from the 2011 China Health and Retirement Longitudinal Study (CHARLS). The two aspects of cognitive impairment assessed in the study were mental status and memory. Sex-stratified logistic regression models were conducted to identify the effect of sleep duration in the different gender groups. Results: of all the participants, 49.8% were females and 32.5% aged 75 years and over. Of the participants, 59.7% had short sleep duration (<7 h/day), and 9.0% of them had long sleep duration (>8 h/day). Compared to normal sleep duration, long sleep duration was associated with lower mental status scores (β = −0.43, p = 0.001) and lower memory scores (β = −0.26, p = 0.006). Long sleep duration was associated with lower mental status in both men (β = −0.37, p = 0.033) and women (β = −0.46, p = 0.025), however, only in men was long sleep duration found to be associated with low memory scores (β = −0.26, p = 0.047). Conclusions: Our study showed that long sleep duration was significantly associated with poorer mental status and memory scores in elderly Chinese people. Paying greater attention to the effects of sleep patterns on the risk of cognitive decline may yield practical implications for dementia prevention and health promotion, especially among older women with lower educational attainment, living in rural areas, and those who have long sleep duration.

Suggested Citation

  • Wei Li & Ning Sun & Anthony Kondracki & Wenjie Sun, 2021. "Sex, Sleep Duration, and the Association of Cognition: Findings from the China Health and Retirement Longitudinal Study," IJERPH, MDPI, vol. 18(19), pages 1-11, September.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:19:p:10140-:d:644151
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    References listed on IDEAS

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    1. Séverine Sabia & Aurore Fayosse & Julien Dumurgier & Vincent T. Hees & Claire Paquet & Andrew Sommerlad & Mika Kivimäki & Aline Dugravot & Archana Singh-Manoux, 2021. "Association of sleep duration in middle and old age with incidence of dementia," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    2. Dandan Zhang & Xin Li & Jinjun Xue, 2015. "Education Inequality between Rural and Urban Areas of the People's Republic of China, Migrants’ Children Education, and Some Implications," Asian Development Review, MIT Press, vol. 32(1), pages 196-224, March.
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