Other Respiratory Conditions and Disorders
INTRODUCTION Sleep disturbance is a common problem in many medical disorders, including respi ratory diseases, such as chronic obstructive pulmonary disease (COPD) and bron chial asthma. Impairment of sleep may worsen symptoms in these disorders and their prognosis. The diseases may also present particular clinical or functional patterns during sleep. Furthermore, since COPD, asthma, and sleep apnea are prev alent in the general population, associations between these disorders may often be found in the same patient, particularly in a hospital setting.