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Subjective apnoea symptoms are associated with daytime sleepiness in patients with moderate and severe obstructive sleep apnoea: a retrospective study
Author(s) -
Ryu H.S.,
Lee S.A.,
Lee G.H.,
Chung Y.S.,
Kim W.S.
Publication year - 2016
Publication title -
clinical otolaryngology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.914
H-Index - 68
eISSN - 1749-4486
pISSN - 1749-4478
DOI - 10.1111/coa.12659
Subject(s) - medicine , epworth sleepiness scale , polysomnography , excessive daytime sleepiness , body mass index , beck depression inventory , physical therapy , retrospective cohort study , sleep disorder , apnea , insomnia , psychiatry , anxiety
Objectives Most previous studies have failed to show a relation between daytime sleepiness and apnoea severity in patients with obstructive sleep apnoea ( OSA ). We determined the relation between daytime sleepiness and subjective and objective apnoea severity in newly diagnosed patients with moderate‐to‐severe OSA . Design Retrospective cross‐sectional study. Setting Tertiary referral centre. Participants A total of 559 adults with newly diagnosed moderate and severe OSA . Main outcome measures Daytime sleepiness was evaluated using the Epworth Sleepiness Scale ( ESS ). Subjective and objective apnoea severities were assessed using the Sleep Breathing Scale ( SBS ) and polysomnography respectively. Sleep quality and depressive symptoms were evaluated using Medical Outcomes Study‐Sleep Scale and Beck Depression Inventory ( BDI ) respectively. Results The mean ESS score was 9.8 ( SD 5.0). ESS score was correlated with SBS score ( P < 0.001), apnoea−hypopnoea index ( AHI ) ( P = 0.027), minimal oxygen saturation (MinSaO 2 ) ( P = 0.021), body mass index ( BMI ) ( P = 0.007) and BDI score ( P < 0.001). Linear regression analysis showed that higher SBS ( P = 0.005) and BDI scores ( P < 0.001) were associated with higher ESS score after controlling for gender, BMI and AHI . Apnoea−hypopnoea index, MinSaO 2 and BMI were not independently related to ESS score. Conclusions Daytime sleepiness was related to subjective OSA symptoms but not objective apnoea severity measured by polysomnography in patients with moderate‐to‐severe OSA . These findings suggest the usefulness of the subjective apnoea severity as an indicator of OSA disease severity.