title: Subjective and objective sleep quality in irritable bowel syndrome.
abstract: OBJECTIVE
  The aim of this study was to compare subjective and objective measures of sleep quality in patients with irritable bowel syndrome (IBS) and controls.
  
  
  METHODS
  The Pittsburgh Sleep Quality Index (PSQI) was used to measure subjective sleep quality, and polysomnography was performed during one night to obtain objective measures of sleep quality, including sleep efficiency, sleep latency, number of arousals, and percentage of slow-wave sleep. Participants were 15 IBS patients and 15 healthy controls.
  
  
  RESULTS
  The results showed a significantly increased global PSQI score in patients, as well as significantly higher scores on several subcomponents of the PSQI (i.e., sleep quality, sleep latency, habitual sleep efficiency, and daytime dysfunction). Analysis of polysomnographic parameters revealed no significant group differences on any measure.
  
  
  CONCLUSIONS
  Complaints of poor sleep quality in the absence of objective sleep abnormalities suggest altered sleep perception, and support that IBS involves exaggerated responses to normal internal or external stimuli.
authors.affiliation: Thomas N. Lynn Institute for Healthcare Research, Oklahoma City, Oklahoma 73112, USA.
authors.forename: S
authors.initials: S
authors.lastname: Elsenbruch
authors.forename: M J
authors.initials: MJ
authors.lastname: Harnish
authors.forename: W C
authors.initials: WC
authors.lastname: Orr
mesh_terms: D000328:Adult; D003109:Colonic Diseases, Functional / Q000503:physiopathology* / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*