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Summary
This summary is machine-generated.

Excessive daytime sleepiness (EDS) and specific sleepiness situations show mixed effects on cognition in older adults. While some situations worsen memory and global cognition, others are linked to better executive function over time.

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Area of Science:

  • Geriatric Epidemiology
  • Cognitive Neuroscience
  • Sleep Medicine

Background:

  • Previous studies linked excessive daytime sleepiness (EDS) to dementia risk.
  • Limited research explored EDS effects on specific cognitive domains or Epworth Sleepiness Scale (ESS) situations.

Purpose of the Study:

  • To investigate the associations between EDS, various ESS sleepiness situations, and cognitive function in community-dwelling older adults.

Main Methods:

  • Longitudinal study (2015-2022) of 377 non-demented older adults.
  • Cognitive function assessed using Taiwanese Montreal Cognitive Assessment and domain-specific tests (memory, attention, executive function, language).
  • EDS measured by ESS (cutoff 11); specific sleepiness situations defined by scoring 1 on individual ESS items. Generalized linear mixed models used.

Main Results:

  • Increased ESS scores correlated with poorer memory but better executive function over time.
  • Dozing while resting or talking was linked to poorer global cognition and memory, respectively.
  • Dozing in passive situations (reading, watching TV, car passenger) was associated with improved executive function.

Conclusions:

  • EDS and specific sleepiness situations exhibit complex, mixed associations with cognitive domains in older adults.
  • Certain sleepiness situations may negatively impact global cognition and memory.
  • Other sleepiness situations are paradoxically linked to enhanced executive function over time.