PURPOSE: Epworth Sleepiness Scale (ESS) can detect severe obstructive sleep apnea-hypopnea syndrome (OSAHS) but it can not detect mild and moderate levels. The purpose of this study was to evaluate Epworth Sleepiness Scale in patients of chronic obstructive pulmonary disease (COPD).
METHODS: DESIGN: Cross-sectional study. SETTING: Referral sleep laboratory of Vallabhbhai Patel Chest Institute, Delhi University, Delhi, India. PATIENTS: 50 eligible patients with a diagnosis of COPD. The diagnosis of COPD was made on the basis of history, physical examination, chest skiagram and pulmonary function tests. MEASUREMENTS: ESS score was evaluated and whole night polysomnography (Medcare polygraph, Medcare Flaga, Reykjavik, Iceland) was done in all the patients. ESS score was considered positive for values >10. OSAHS was defined as apnea-hypopnea index of more than 5 per hour.
RESULTS: 76.92% of patients with normal AHI, had ESS score ≤; 10 and 4.17% of patients with high AHI scored >10 (p value = 0.1).
CONCLUSION: ESS cannot replace polysomnography in COPD patients as it does not detect all levels of apnea.
CLINICAL IMPLICATIONS: Epworth sleepiness scale can not be used as a screening test for COPD patients with co-existent OSAHS.
DISCLOSURE: Amit Bansal, No Financial Disclosure Information; No Product/Research Disclosure Information