Is sleep quality related to cognition in individuals with heart failure?

Abstract

Objective: To examine how self-reported sleep quality and daytime symptoms are associated with selected domains of cognitive function among individuals with heart failure (HF). Background: HF patients suffer from poor sleep quality and cognitive decline. The relationship between sleep and cognition has not been well documented among individuals with HF. Methods: In this descriptive, cross-sectional study, 68 individuals with HF (male: 63%, mean age=72 years, SD=11) completed sleep questionnaires and a neuropsychological battery. Results: Participant had mean Pittsburgh Sleep Quality Index score of 5.04 (SD=2.8). Regression analyses demonstrated neither sleep quality or excessive daytime sleepiness (EDS) were related to cognitive function, but daytime dysfunction was related to lower letter fluency and attention index. Conclusion: Contrary to some earlier reports, subjective sleep and EDS in this group of individuals was not associated with cognitive decline.