To detect the existence of severe obstructive sleep apnea (OSA) in chronic obstructive pulmonary disease (COPD) patients, which had higher mortality and hospitalization rate, a simplified questionnaire was developed for identifying those COPD patients with severe OSA.
With patient's BMI, neck and waist circumference, snores, witnessed apnea...
Time frame suspect to enroll 5 patients in 1 month and complete 4 patients at least we need 24 months to complete 120 patients
