The relationship between the Epworth Sleepiness Scale and polysomnographic parameters in obstructive sleep apnea patients.
The aim of this study was to investigate the relationship between the subjective Epworth Sleepiness Scale (ESS) and objective polysomnographic parameters that was compared in dichotomized groups of obstructive sleep apnea (OSA) patients with and without excessive daytime sleepiness (EDS). A retrospective review of the 96 consecutive snoring patients suspected of OSA due to upper airway problems was performed. ESS score was assessed and EDS was considered present when the ESS score was >10. Polysomnography was performed for each patient. Comparisons of polysomnographic parameters between both groups of patients were performed using Mann-Whitney U-tests. The Pearson's correlation coefficient was calculated. EDS patients showed significantly greater body mass index (BMI), AHI and ODI, higher percentage of snoring time, a longer time length of SpO(2) < 90% and lower minimum SpO(2) compared to no EDS patients. There was no statistical difference in other sleep parameters. A positive correlation between the ESS score and BMI, percentage of snoring time, minimum SpO(2) and time length of SpO(2) < 90% was identified. Despite many controversies, our conclusion is that apnea/hypoxemia has considerable coherence to account for the EDS measured by ESS in OSA patients.
Department of Otorhinolaryngology, Head and Neck Surgery, Eulji Hospital, Eulji University College of Medicine, 280-1 Hagye-dong, Nowon-gu, Seoul 139-711, South Korea. entdoc@eulji.ac.kr
Seung Ju
SJ
Lee
Hyun Woo
HW
Kang
Lae Hyung
LH
Lee
D000293:Adolescent; D000328:Adult; D000368:Aged; D015992:Body Mass Index; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography / Q000379:methods*; D011379:Prognosis; D012189:Retrospective Studies; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology*; D020181:Sleep Apnea, Obstructive / Q000150:complications* / Q000503:physiopathology; D055815:Young Adult