title: Sleep: a marker of physical and mental health in the elderly.
abstract: OBJECTIVE
  The objective of this study was to determine the occurrence and recognition of common sleep-related problems and their relationship to health-related quality-of-life measures in the elderly.
  
  
  METHODS
  A total of 1,503 participants with a mean age of 75.5 (+/- 6.8, range: 62-100) years from 11 primary care sites serving primarily elderly patients were interviewed. Subjects completed a five-item sleep questionnaire and the SF-12. A Physical Component Summary (PCS-12) and Mental Component Summary (MCS-12) score was calculated. A systematic medical chart review was conducted to determine whether sleep problems were identified by the healthcare providers.
  
  
  RESULTS
  A total of 68.9% of patients reported at least one sleep complaint and 40% had two or more. Participants most commonly endorsed (45%) that they had "difficulty falling asleep, staying asleep, or being able to sleep." The number and type of sleep problems endorsed was associated with both physical and mental health quality-of-life status. Excessive daytime sleepiness was the best predictor of poor mental and physical health-related quality of life. Even when all five sleep questions were endorsed, a sleep complaint was only reported in the chart 19.2% of the time.
  
  
  CONCLUSIONS
  When elicited, sleep complaints predicted the general physical and mental health-related quality-of-life status in elderly populations with comorbid medical and mental illnesses. Yet, questions regarding sleep are not an integral component of most clinical evaluations. Given the growing evidence of a relationship between sleep and health, identification of sleep disorders could lead to improved management of common age-related chronic illnesses and quality of life of elderly patients.
authors.affiliation: Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA.
authors.forename: Kathryn J
authors.initials: KJ
authors.lastname: Reid
authors.forename: Zoran
authors.initials: Z
authors.lastname: Martinovich
authors.forename: Sanford
authors.initials: S
authors.lastname: Finkel
authors.forename: Judy
authors.initials: J
authors.lastname: Statsinger
authors.forename: Robyn
authors.initials: R
authors.lastname: Golden
authors.forename: Kathryne
authors.initials: K
authors.lastname: Harter
authors.forename: Phyllis C
authors.initials: PC
authors.lastname: Zee
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D003710:Demography; D005260:Female; D015438:Health Behavior; D006304:Health Status; D006801:Humans; D008297:Male; D008603:Mental Health; D011788:Quality of Life / Q000523:psychology*; D012890:Sleep / Q000502:physiology*; D011795:Surveys and Questionnaires