The JAMA Neurology study found that sleeping six hours or less per night was associated with impaired cognition, especially memory.
Notes on verification
Confirmed against the primary JAMA Neurology study (Winer et al. 2021) and corroborated by an independent secondary source (Alzheimer Europe), plus the original journal article itself.
Sources
- How much sleep keeps cognitive decline at bay? - Harvard Health (health.harvard.edu)
- https://pubmed.ncbi.nlm.nih.gov/34459862/ (pubmed.ncbi.nlm.nih.gov)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8406215 (pmc.ncbi.nlm.nih.gov)
- https://www.alzheimer-europe.org/news/new-research-jama-neurology-explores-impact-sleep-duration-amyloid-accumulation-and-cognitive?language_content_entity=en (alzheimer-europe.org)
- https://jamanetwork.com/journals/jamaneurology/fullarticle/2783664 (jamanetwork.com)