Prevalence and impacts of poor sleep on quality of life and associated factors of good sleepers in a sample of older Chinese adults.
BACKGROUND
Sleep disturbance is a complex health problem in ageing global populations decreasing quality of life among many older people. Geographic, cultural, and ethnic differences in sleep patterns have been documented within and between Western and Asian populations. The aim of this study was to explore sleep problems among Hong Kong seniors by examining the prevalence of poor sleep quality, the relationship between sleep quality and health-related quality of life, and associated factors of good sleepers in different age groups.


METHODS
This cross-sectional study used convenience sampling and gathered data during face-to-face interviews. Older community-dwelling individuals (n = 301) were recruited in community centres in 2010. The Pittsburgh Sleep Quality Index and Medical Outcomes Study Short Form-36 were used to measure sleep quality and health-related quality of life. The Medical Outcomes Study Short Form-36 domain scores were compared between good and bad sleepers and between long and short sleepers using Hotelling's T-Square test. SF-36 domain scores were placed into a logistic regression model that controlled for significant demographic variables (gender, educational level, perceived health).


RESULTS
Most (77.7%) participants were poor sleepers. Participants who had global Pittsburgh Sleep Quality Index scores <5 and slept ≥5.5 h/night had better health-related quality of life. Vitality, emotional role, physical functioning, and bodily pain domain scores were associated factors of good sleepers in different age groups.


CONCLUSIONS
This study found a strong negative association between sleep deprivation (poor quality, short duration) and health-related quality of life. Associated factors for good sleep quality in later life differ among age groups in relation to universal age-related changes, and should be addressed by social policies and health-care programmes.
RN BN Master of Gerontology Doctor of Health Sciences, School of Nursing, Faculty of Medicine, The University of Hong Kong, Hong Kong, People's Republic of China. meihan@hku.hk
Catherine M H
CM
Lo
Paul H
PH
Lee
D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D002908:Chronic Disease / Q000453:epidemiology; D003151:Community Health Centers; D003430:Cross-Sectional Studies; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011788:Quality of Life / Q000523:psychology*; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology*; D012892:Sleep Deprivation / Q000453:epidemiology*; D012923:Social Class; D011795:Surveys and Questionnaires