PeerJ (Feb 2023)

The relationship between sleep duration and activities of daily living (ADL) disability in the Chinese oldest-old: A cross-sectional study

  • Zhaoping Wang,
  • Xiaolin Ni,
  • Danni Gao,
  • Sihang Fang,
  • Xiuqing Huang,
  • Mingjun Jiang,
  • Qi Zhou,
  • Liang Sun,
  • Xiaoquan Zhu,
  • Huabin Su,
  • Rongqiao Li,
  • Bin Huang,
  • Yuan Lv,
  • Guofang Pang,
  • Caiyou Hu,
  • Ze Yang,
  • Huiping Yuan

DOI
https://doi.org/10.7717/peerj.14856
Journal volume & issue
Vol. 11
p. e14856

Abstract

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Objective To investigate the relationship between sleep duration and activities of daily living (ADL) disability, and to explore the optimal sleep duration among oldest-old Chinese individuals. Methods In this cross-sectional study, 1,798 participants (73.2% female) were recruited from Dongxing and Shanglin in Guangxi Zhuang Autonomous Region, China in 2019. The restricted cubic spline function was used to assess the dose-response relationship between sleep duration and ADL disability, and the odds ratios (ORs) of the associations were estimated by logistic regression models. Results The overall prevalence of ADL disability was 63% (64% in females and 58% in males). The prevalence was 71% in the Han population (72% in females and 68% in males), 60% in the Zhuang population (62% in females and 54% in males) and 53% in other ethnic population (53% in females and 53% in males). A nonlinear relationship between sleep duration and ADL disability was observed. Sleep duration of 8-10 hours was associated with the lowest risk of ADL disability. Sleep duration (≥12 hours) was associated with the risk of ADL disability among the oldest-old individuals after adjusting for confounding factors (OR = 1.47, 95% CI [1.02, 2.10], p < 0.05). Conclusion Sleep duration more than 12 hours may be associated with an increased risk of ADL disability in the oldest-old individuals, and the optimal sleep duration among this population could be 8–10 h.

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