title: Sleep quality and daytime sleepiness in patients with COPD and asthma.
abstract: BACKGROUND
  Nocturnal symptoms are common and important in both asthma and COPD but the relationship between sleep quality and diseases' characteristics has not been fully studied.
  
  
  OBJECTIVE
  To compare sleep quality and daytime sleepiness in asthma and COPD patients and to explore its relation to diseases' characteristics.
  
  
  METHODS
  In this cross-sectional study, we examined 217 consecutive asthma and COPD patients who underwent pulmonary function tests at The Center for Pathophysiology of Breathing and Sleep Medicine of The Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica, Serbia between July 2014 and January 2015. All patients completed Pittsburgh Sleep Quality Index (PSQI) and Epworth Sleepiness Scale (ESS).
  
  
  RESULTS
  Study included 117 patients with asthma, 100 patients with COPD, and 102 healthy controls. There was no difference in PSQI and ESS between patients with asthma and COPD (4.9 ± 3.9 vs 5.8 ± 4.3, P = .09 and 4.8 ± 3.4 vs 4.7 ± 3.6, P = .69, respectively). PSQI and ESS did not correlate with lung function parameters. Patients with uncontrolled asthma had higher PSQI scores (uncontrolled 7.0 ± 3.7 vs partially controlled 4.6 ± 3.1 vs controlled 3.2 ± 3.7, P < .001). PSQI scores were higher in COPD group D and B compared to A and C (group D 6.9 ±4.6 vs B 6.8 ± 4.1 vs A 2.9 ± 1.3 vs C 3.1 ± 3.9, P < .001). Compared to asthma, COPD patients had longer sleep latency and used sleep regulating medications more often.
  
  
  CONCLUSIONS
  There is no difference in sleep quality and level of daytime sleepiness between patients with asthma and COPD. Poor sleep quality is related to level of asthma control and is associated with COPD groups B and D.
authors.affiliation: Centre for Pathophysiology of Breathing and Sleep Medicine, The Institute for Pulmonary Diseases of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Marija
authors.initials: M
authors.lastname: Vukoja
authors.affiliation: Centre for Pathophysiology of Breathing and Sleep Medicine, The Institute for Pulmonary Diseases of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Ivan
authors.initials: I
authors.lastname: Kopitovic
authors.affiliation: Centre for Pathophysiology of Breathing and Sleep Medicine, The Institute for Pulmonary Diseases of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Dragana
authors.initials: D
authors.lastname: Milicic
authors.affiliation: Department for Chronic Obstructive Pulmonary Disease, The Institute for Pulmonary Diseases of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Olivera
authors.initials: O
authors.lastname: Maksimovic
authors.affiliation: Department for Sarcoidosis and Diffuse Pulmonary Diseases, The Institute for Pulmonary Diseases of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Zora
authors.initials: Z
authors.lastname: Pavlovic-Popovic
authors.affiliation: Polyclinic, The Institute for Pulmonary Diseases of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Miroslav
authors.initials: M
authors.lastname: Ilic
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000453:epidemiology* / Q000503:physiopathology; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000453:epidemiology* / Q000503:physiopathology; D012129:Respiratory Function Tests / Q000379:methods; D055771:Serbia / Q000453:epidemiology; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000453:epidemiology*
keywords: COPD; asthma; sleep disorders; sleep quality