Self‐reported quality of sleep is associated with bodily pain, vitality and cognitive impairment in Japanese older adults

<jats:sec><jats:title>Aim</jats:title><jats:p>Poor sleep can affect physical and mental health, and consequently people's quality of life (<jats:styled-content style="fixed-case">QOL</jats:styled-content>); however, only a few studies have addressed the potential associations of physical and mental health with quality of sleep (<jats:styled-content style="fixed-case">QOS</jats:styled-content>) in <jats:styled-content style="fixed-case">J</jats:styled-content>apan. The present study aimed to investigate the association of <jats:styled-content style="fixed-case">QOS</jats:styled-content> with sociodemographic and lifestyle characteristics, cognitive status, nutrition, depression, seclusion, and <jats:styled-content style="fixed-case">QOL</jats:styled-content> in <jats:styled-content style="fixed-case">J</jats:styled-content>apanese community‐dwelling older adults.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Data were collected through self‐administered questionnaires and other specific tests in 145 (age 73 years [range 70–77 years]) participants. The χ<jats:sup>2</jats:sup>‐test or <jats:styled-content style="fixed-case">F</jats:styled-content>isher's exact test were used to compare categorical variables stratified by <jats:styled-content style="fixed-case">QOS</jats:styled-content>, and the <jats:styled-content style="fixed-case">M</jats:styled-content>ann–<jats:styled-content style="fixed-case">W</jats:styled-content>hitney <jats:italic><jats:styled-content style="fixed-case">U</jats:styled-content></jats:italic>‐test was used for continuous variables. Furthermore, logistic regression analyses were carried out to verify the associations with <jats:styled-content style="fixed-case">QOS</jats:styled-content>.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>The poor <jats:styled-content style="fixed-case">QOS</jats:styled-content> group had more males (<jats:italic>P</jats:italic> < 0.05), a shorter self‐reported sleep duration (<jats:italic>P</jats:italic> < 0.001), higher body mass index (<jats:italic>P</jats:italic> < 0.05) and higher risk of depression (<jats:italic>P</jats:italic> < 0.05), whereas the good <jats:styled-content style="fixed-case">QOS</jats:styled-content> group showed higher scores in the <jats:styled-content style="fixed-case">QOL</jats:styled-content> summary and domains of physical component (<jats:italic>P</jats:italic> < 0.01), general health (<jats:italic>P</jats:italic> < 0.001), bodily pain (<jats:italic>P</jats:italic> < 0.001) and vitality (<jats:italic>P</jats:italic> < 0.001). In the logistic regression model, cognitive status (<jats:styled-content style="fixed-case">OR</jats:styled-content> 0.13, 95% <jats:styled-content style="fixed-case">CI</jats:styled-content> 0.03–0.55), bodily pain (<jats:styled-content style="fixed-case">OR</jats:styled-content> 0.91, 95% <jats:styled-content style="fixed-case">CI</jats:styled-content> 0.84–1.00) and vitality (<jats:styled-content style="fixed-case">OR</jats:styled-content> 0.82, 95% <jats:styled-content style="fixed-case">CI</jats:styled-content> 0.73–0.92) were associated with <jats:styled-content style="fixed-case">QOS</jats:styled-content>.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>The present study provides evidence that <jats:styled-content style="fixed-case">QOS</jats:styled-content> is linked to cognitive status, bodily pain and vitality in <jats:styled-content style="fixed-case">J</jats:styled-content>apanese older adults. We maintain that screening a person's sleep characteristics in a community setting might be relevant to identify those older adults at risk of a poor <jats:styled-content style="fixed-case">QOL</jats:styled-content> and frailty in the early phase, triggering further health analyses. <jats:bold>Geriatr Gerontol Int 2014; 14: 628–635.</jats:bold></jats:p></jats:sec>