Impaired sleep in chronic fatigue syndrome: how is it best measured?
The goal was to examine comparative efficacy of polysomnography, actigraphy, and self-report in evaluating the sleep/wake experience of individuals with chronic fatigue syndrome (CFS). Sleep parameters were evaluated by the three measurement modalities for the same night in 49 participants with CFS. Psychological and daytime functioning were measured by self-report. Results indicate that: (a) objectively measured nocturnal sleep time effectively approximated subjective experience although nocturnal wakefulness did not; (b) total sleep time and sleep efficiency differentiated individuals with and without insomnia complaints; (c) daytime sleepiness, fatigue, and non-refreshing sleep were not reflected by the objective sleep-related measures (polysomnography and actigraphy).
Creti
Laura
L
Department of Psychiatry, SMBD Jewish General Hospital, 4333 Cote Ste Catherine Road, B-28, Montreal, Quebec, H3T 1E4, Canada. laura.creti@mail.mcgill.ca
Libman
Eva
E
Baltzan
Marcel
M
Rizzo
Dorrie
D
Bailes
Sally
S
Fichten
Catherine S
CS
D000293:Adolescent; D000328:Adult; D000368:Aged; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology; D015673:Fatigue Syndrome, Chronic / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography / Q000379:methods*; D007319:Sleep Initiation and Maintenance Disorders / Q000175:diagnosis* / Q000453:epidemiology*; D011795:Surveys and Questionnaires; D055815:Young Adult