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Sleep quality perception in the chronic fatigue syndrome. Correlations with sleep efficiency, affective symptoms and intensity of fatigue

2008; Elsevier BV; Volume: 5; Issue: 15 Linguagem: Inglês

10.1016/s1769-4493(08)70103-1

2352-3395

Daniel Neu, Olivier Maîresse, Guy Hoffmann, Amirouche Dris, Luc Lambrecht, Paul Linkowski, Paul Verbanck, Olivier Le Bon,

Fibromyalgia and Chronic Fatigue Syndrome Research

One of the core symptoms of the chronic fatigue syndrome (CFS) is unrefreshing sleep and a subjective sensation of poor sleep quality. Whether this perception can be expressed, in a standardized questionnaire as the Pittsburgh Sleep Quality Index (PSQI), has to our knowledge never been documented in CFS. Furthermore correlations of subjective fatigue, PSQI, affective symptoms and objective parameters as sleep efficiency are poorly described in the literature. During a prospective protocol we studied measures like PSQI, Fatigue Severity Scale (FSS) scores and intensity of affective symptoms rated by the Hamilton Depression and Anxiety scales as well as objective sleep quality parameters measures by polysomnography of 28 “pure” (no primary sleep and no psychiatric disorders) CFS patients compared to age and gender matched healthy controls. The PSQI showed significantly poorer subjective sleep quality in CFS patients than in healthy controls. In contrast, objective sleep quality parameters, like the sleep efficiency index (SEI) or the amount of Slow Wave Sleep did not differ significantly. Subjective sleep quality showed a correlation trend to severity of fatigue and was not correlated to the intensity of affective symptoms in CFS. Our findings may indicate that a sleep quality misperception exists in CFS or that potential nocturnal neurophysiological disturbances involved in the non-recovering sensation in CFS are not expressed by sleep variables as SEI or sleep stage distributions and proportions.