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.