Importance Sleep disturbances and clinical sleep disorders are associated with all-cause
dementia and neurodegenerative conditions, but it remains unclear how longitudinal …

Importance An association between sleep duration and the trajectory of cognitive decline
has not been conclusively demonstrated. Objective To investigate the association between …

Introduction Previous research has identified a link between sleep disturbances and
cognitive impairment; however, no study has examined this relationship using a national …

Sleep difficulties have been implicated in the development and progression of dementia and
in all‐cause mortality. This study examines the relationship between sleep difficulties …

Importance Disrupted sleep is common in aging and is associated with cognition. Age-
related changes to sleep are associated with multiple causes, including early Alzheimer …

Objective Excessive and insufficient sleep have been associated with cognitive dysfunction
in older adults in US and non-US studies. However, the US studies were not in nationally …

Sleep laboratory studies find that restricted sleep duration leads to worse short-term
cognition, especially memory. Observational studies find associations between self-reported …

Study Objectives: To investigate interactions between high and low amounts of sleep and
other predictors of cognitive performance. Methods: We used four cognitive tests to …

Background Evidence on sleep duration or quality and cognitive function in diverse older
adults is limited. We examined prospective associations between subjective sleep measures …

Objectives In older adults, both short and long sleep duration are associated with lower
cognitive function, suggesting an inverted U-shaped association between sleep duration …