U-shaped link between sleep duration and Alzheimer's brain atrophy, cognitive decline

Sleep duration exhibited a U-shaped association with Alzheimer's disease-related brain atrophy (p=0.001) and cognition (p<0.001) in 38,816 adults. Short (5-6h) and long (9-10h) sleep linked to worse cognitive performance. Insomnia and hypersomnia also increased 10-year AD risk i…

• Population-based cohort study in UK Biobank (n=38,816) with MRI and cognitive tests; separate EHR validation cohort.
• Both insomnia and hypersomnia were associated with increased 10-year Alzheimer's risk (exact risk magnitudes not reported in source).
• Observational design with self-reported sleep; cross-sectional MRI analysis limits causal inference.

RadPigeon summaries are original and for information only. They are not clinical advice.