On this page
Study design
This repeated-measures study followed 233 community-dwelling adults aged 55 or older at three time points over two years. Sleep duration and efficiency were measured with seven-day wrist accelerometry, alongside self-rated sleep quality. Cognitive testing covered memory, executive function, and processing speed.
What it found
Higher sleep efficiency was associated with better executive-function scores. Sleep duration, self-rated quality, and combined sleep-health score were not significantly associated with any measured cognitive domain. The sleep-efficiency association did not differ significantly across assessment points.
Limits and interpretation
This observational cohort cannot show that increasing sleep efficiency would improve executive function. Wearable and questionnaire measures capture only selected sleep features, and the sample was modest. The largely null results across other domains are part of the finding.
This sourced news summary and translation were prepared with AI assistance. Source links, the news date and research limitations are disclosed; this is not a claim of independent medical expert review. News production method.
Sources
Research news is not medical advice or a recommendation to use a substance. Read findings in the context of the study design, participants and limitations. Editorial standards.
← All news