BMC Psychiatry (Feb 2022)

U-shaped association between sleep duration and subjective cognitive complaints in Chinese elderly: a cross-sectional study

  • Li-Hua Lin,
  • Wen-Qi Xu,
  • Shi-Bin Wang,
  • Qing Hu,
  • Ping Zhang,
  • Jia-Hao Huang,
  • Yun-Fei Ke,
  • Kai-Rong Ding,
  • Cai-Lan Hou,
  • Fu-Jun Jia

DOI
https://doi.org/10.1186/s12888-022-03738-0
Journal volume & issue
Vol. 22, no. 1
pp. 1 – 11

Abstract

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Abstract Background Subjective cognitive decline (SCD) may be the early screening signal to distinguish susceptible population with Alzheimer’s disease (AD) and mild cognitive impairment (MCI). Subjective cognitive complaints (SCCs) have been proved strongly associated with SCD. This study aimed to explore the association between sleep duration and SCCs in the Chinese elderly. Methods We conducted a cross-sectional study involving 688 participants aged 60 years and older in Guangdong Province, China. SCCs were assessed by the Subjective Cognitive Decline questionnaire 9 (SCD-Q9), which contained 9 items with two dimensions, including the overall memory function and time comparison (OMTC) and daily activity ability (DAA). Restricted cubic splines and generalized additive model (GAM) were used to fit the association between sleep duration and SCD-Q9 score. Results There were significant U-shaped associations between sleep duration and overall score of SCD-Q9 (EDF = 3.842, P 8 h) and shorter duration (< 8 h) were linked to worse SCCs. Future studies should explore the protective effect of managing sleep duration on SCD and its progression to dementia.

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