Sleep disorders and incident dementia: a nationwide observational cohort study

In recent years, significant research efforts have focused on identifying modifiable risk factors to be leveraged for dementia prevention. Sleep is required for memory consolidation and normal brain functioning, and various mechanisms are proposed between poor sleep quality and cognitive impairment. Several studies have examined the role of sleep disturbances as a risk factor for dementia; however, most of these studies have involved smaller cohorts and short time intervals, and often rely on retrospective surveys and self‐reported exposure data. Our aim was to examine the association between sleep disorders and late‐onset dementia in an entire population.