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.