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. [tier=gold indep_score=0.983 clusters=3 claim_tier=notable | framework convergence=single on Winer et al. 2021 JAMA Neurology study using A4 study cohort data (upstreams: A4 study (Anti-Amyloid Treatment in Asymptomatic Alzheimer's Disease study), Winer et al. 2021 JAMA Neurology) — publishers independent, evidence may not be | kind=attributed eligibility=high]
Sources
- How much sleep keeps cognitive decline at bay? - Harvard Health (seed:psychology_and_neuroscience)
- https://pubmed.ncbi.nlm.nih.gov/34459862/ (corroboration)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8406215 (corroboration)
- https://www.alzheimer-europe.org/news/new-research-jama-neurology-explores-impact-sleep-duration-amyloid-accumulation-and-cognitive?language_content_entity=en (corroboration)
- https://jamanetwork.com/journals/jamaneurology/fullarticle/2783664 (corroboration)