Sleep discrepancy: Exploring the link to cognitive function and brain health

In older adults, there is a well-established link between suboptimal sleep and poorer cognition;however, the relationship between sleep discrepancy (the discordance between self-reported andobjective sleep) and cognition is not well understood. Sleep discrepancy appears common in olderadults, with preliminary findings that greater discrepancy is associated with higher beta-amyloidburden and poorer cognition, warranting investigation of discrepancy as a potential marker/risk factorfor late-life cognitive decline. However, the existing literature is scant, with methodological limitations.Across three exploratory empirical studies, we investigated the link between sleep discrepancy andmarkers of brain health and cognition in community-dwelling older adults.