Sleep discrepancy and cognitive function in community‐dwelling older adults

Summary This was the first study to use cluster analysis to characterise sleep discrepancy (the discordance between self‐reported and objective sleep) across multiple sleep parameters, in community‐dwelling older adults. For sleep efficiency, negative discrepancy (the tendency to self‐report worse sleep than objectively‐measured) was associated with poorer memory, independent of insomnia severity, depressive symptoms and objective sleep. This suggests a unique role for sleep discrepancy as a possible risk factor for future cognitive decline, and warrants the need for further research.