Evaluation of Sleep Quality and Daytime Sleepiness among Patients with Chronic Respiratory Diseases.
Background: Sleep disturbance is frequent in chronic respiratory diseases because nocturnal cough, dyspnea, airflow limitation, hypoxemia, and recurrent exacerbations can disrupt sleep continuity and daytime function. Objectives: To evaluate sleep quality and daytime sleepiness among patients with chronic respiratory diseases and to assess their association with disease type, disease severity, nocturnal symptoms, and selected clinical parameters. Methods: This hospital-based cross-sectional observational study was conducted at Kamineni Institute of Medical Sciences, Narketpally, Telangana, India. A total of 100 adult patients with chronic respiratory diseases were included. Demographic details, smoking status, respiratory diagnosis, disease severity, nocturnal symptoms, exacerbation history, dyspnea grade, and resting oxygen saturation were recorded. Sleep quality was assessed using the Pittsburgh Sleep Quality Index, and daytime sleepiness was assessed using the Epworth Sleepiness Scale. Results: The mean age was 56.8 ± 13.2 years, and males constituted 62% of the study population. Chronic obstructive pulmonary disease was the most common diagnosis, followed by bronchial asthma. The mean Pittsburgh Sleep Quality Index score was 8.6 ± 3.2, and poor sleep quality was observed in 68% of patients. The mean Epworth Sleepiness Scale score was 9.4 ± 4.1, and excessive daytime sleepiness was present in 39% of patients. Severe disease was associated with higher frequencies of poor sleep quality and excessive daytime sleepiness. Pittsburgh Sleep Quality Index score showed a positive correlation with Epworth Sleepiness Scale score, dyspnea grade, and exacerbation frequency, and a negative correlation with resting oxygen saturation. Conclusion: Poor sleep quality and daytime sleepiness were common among patients with chronic respiratory diseases. Sleep assessment should be considered as part of routine respiratory evaluation, especially in patients with severe disease, nocturnal symptoms, frequent exacerbations, and lower oxygen saturation.