Duration of night sleep and cognitive performance of community older adults

Abstract

Objective: to analyze the relationship between the duration of self-reported night sleep and the cognitive performance of older adults. Method: the sample consisted of 156 older adults registered in Family Health Units (FHUs) in a city of São Paulo, divided into quartiles according to the duration of night sleep. Data collection was performed using a characterization questionnaire, Addenbrooke’s Cognitive Exam – Revised (ACE-R) and Pittsburgh Sleep Quality Index (PSQI). Descriptive, comparative and correlational statistical analyses were performed. Results: the older adults obtained a mean of 61.94 points in ACE-R and 55.1% presented good sleep quality. Comparative analyses showed differences between the groups only in the cognitive domain of verbal fluency (p=0.018). The post-hoc analyses showed that older adults who slept more hours, a mean of 8.85 hours (Q1), had lower scores when compared to those who slept a mean of 6.11 hours (Q3) (p=0.004) and of 4.52 hours (Q4) (p=0.045). The adjusted model with application of the stepwise method showed a relationship between the independent variables of schooling and sleep duration and the domain verbal fluency. Conclusion: it is concluded that sleep duration is related to the verbal fluency cognitive domain.

Relação entre duração do sono, sintomas depressivos e estresse em pessoas idosas da comunidade

“…Os transtornos do sono são considerados frequentes na população idosa 3,25 . Na amostra estudada, 71,6% apresentaram distúrbios do sono leve e, em sua maioria ,não faziam uso de nenhum medicamento para dormir (72,4%), corroborando o descrito na literatura nacional e internacional 24,26 .…”

Qualidade do sono, variáveis pessoais e laborais e hábitos de vida de enfermeiros hospitalares

“…Over the years, and with the physiological changes resulting from age, SQ has been reduced 37 . Age influences the sleep parameters, and the physiological needs change throughout life 38 .…”

Sleep duration and cognitive function among rural older adults in China: a population- based study

“…Sleep duration per night was categorized into four groups: ≤5 hours, 6 hours, 7 hours, and ≥ 8 hours. Previous studies have suggested that 6 hours of sleep is bene cial, and thus 6 hours of sleep per night was used as the reference group [17,18,21].…”

“…Meanwhile, a meta-analysis found that the relationship between sleep duration and the risk of cognitive dysfunction showed a Ushaped dose-response relationship, and individuals with sleep duration of 7-8 hours per night were at the lowest risk of cognitive impairment, sleep duration shorter or longer than this was associated with a higher risk of cognitive impairment [16]. At present, there are inconsistencies in the optimal sleep duration for the elderly, and previous studies have suggested that 6-8 hours of sleep is more appropriate for the stability of cognitive function [17,18]. While most of the population-based studies regarding the relation of sleep parameters with cognitive function have been conducted among urban populations.…”