Abstract
Introduction: Patients with chronic obstructive pulmonary disease (COPD) frequently suffer from nocturnal alterations in gas exchange. The aim of the present study was to observe and describe the sleep pattern and quality in patients with varying severity of COPD.
Methodology: In this observational study we included all cases of known stable or newly diagnosed COPD on spirometry as per GOLD criteria with or without complaints of changes in sleep pattern or quality from January 1, 2018 till April 30, 2018. Demography, past medical history, clinical presentation and anthropometry were noted. Polysomnography was performed using standard techniques and manually analysed.
Results: During the study period a total of 168 patients were included; 67% males and mean age 64.2 years. Mean sleep efficiency in mild COPD was 82.7%, moderate COPD was 83.1 % and in severe COPD was 94.3%. Sleep latency was decreased in severe COPD patients, normal in mild and moderate COPD. Mean duration of Stage N1 was 12.9%, 20.1% and 14.32% in mild, moderate and severe COPD respectively. Mean duration of Stage N2 was 30.2%, 32.1% and 42.6% in mild, moderate and severe COPD respectively. Mean duration of Stage N3 in mild COPD was 52%, in moderate COPD was 36.2% and in severe COPD was 25.5 % of total sleep time. Further, we observed that the mean duration of Stage R in mild COPD was 4.6 %, in moderate COPD was 3.7 % and in severe COPD was 5.9 % of total sleep time.
Conclusions: Clinicians need to be aware about the decreased quality of sleep in COPD patients. Good sleep hygiene and measures to improve sleep quality will help to improve the quality of life of COPD patients.
Keywords: chronic obstructive pulmonary disease, sleep, sleep quality, insomnia.
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Corresponding Author
Dr Sarang Patil
Junior Resident, Dept. of Pulmonary Medicine
Dr. D.Y. Patil Medical College, Nerul,
Navi Mumbai (400706), Maharashtra, India
DOI: https://dx.doi.org/10.18535/jmscr/v6i7.89
