The restorative function of sleep is shaped by its duration, timing, continuity, subjective
quality, and efficiency. Current sleep recommendations specify only nocturnal duration and …

Background Daytime napping may improve cognitive function in older adults. However, the
association can be complicated by specific features of napping and the older adult's health …

Background Sleep status, including sleep quality and nap duration, may be associated with
frailty and cognitive impairment in older adults. Older adults living in nursing homes may be …

Purpose Current evidence of whether napping promotes or declines cognitive functions
among older adults is contradictory. The aim of this study was to determine the association …

A growing body of evidence indicates that napping is common among older adults.
However, a systematic review on the effect of napping on the elderly is lacking. The aim of …

Purpose There is a scarcity of summarizing data on the epidemiology of insomnia in older
persons, especially when diagnosed with international criteria. This study aimed to estimate …

Objective Observational studies had demonstrated a link between sleep disturbances and
cognitive decline. Here, we aimed to investigate the causal association between genetically …

Abstract Study Objectives Rest-activity rhythms (RAR) may mark development, aging, and
physical and mental health. Understanding how they differ between people may inform …

Introduction Night sleep duration and total sleep duration are associated with frailty.
However, the association between daytime nap duration and the risks of frailty has not been …

The understanding of the prevalence of sleep problems in older adults can provide a broad
and reliable perspective into the occurrence of such issues among older adults. This …