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The occurrence of both chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) in an individual patient has been described as 'overlap syndrome', which has been associated with poor prognosis. Little is known about the possible predictors of the overlap syndrome and its association with comorbidities contributing to impaired outcome.

Predictors of the Overlap Syndrome and Its Association with Comorbidities in Patients with Chronic Obstructive Pulmonary Disease