title: Diurnal variation in daytime sleepiness of patients with sleep apnea syndrome.
abstract: Diurnal variations in daytime sleepiness were studied in 26 men with sleep apnea syndrome (SAS) [age, 41.7 +/- 9.9 years (mean +/- SD); body mass index, 30.0 +/- 6.2 kg/m2; Epworth Sleepiness Score, 8.7 +/- 4.1; apnea-hypopnea index, 50.2 +/- 22.0]. Sleep latencies measured at 09.00 h, 11.00 h, 13.00 h, 15.00 h, and 17.00 h were 3.4 +/- 3.6 min, 4.7 +/- 5.5 min, 5.2 +/- 4.4 min, 5.3 +/- 5.4 min, and 9.3 +/- 7.2 min, respectively (ANOVA, P < 0.05). Daytime sleepiness in patients with SAS was more pronounced in the morning than in the afternoon and evening.
authors.affiliation: Department of Neurology, Dokkyo University School of Medicine, Mibu, Tochigi, Japan. miyamasa@dokkyomed.ac.jp
authors.forename: Masayuki
authors.initials: M
authors.lastname: Miyamoto
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Miyamoto
authors.forename: Kayoko
authors.initials: K
authors.lastname: Iwata
authors.forename: Koichi
authors.initials: K
authors.lastname: Hirata
mesh_terms: D000328:Adult; D002940:Circadian Rhythm / Q000502:physiology*; D006970:Disorders of Excessive Somnolence / Q000150:complications* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D017286:Polysomnography; D012891:Sleep Apnea Syndromes / Q000150:complications* / Q000503:physiopathology; D020178:Sleep Disorders, Circadian Rhythm / Q000150:complications* / Q000503:physiopathology; D012894:Sleep Stages / Q000502:physiology