
Keywords: بیماری مزمن انسدادی ریه; BMI; Body mass index; CHRF; Chronic hypercapnic respiratory failure; COPD; Chronic obstructive pulmonary disease; FEV1; Forced expiratory volume in one second; FVC; Forced vital capacity; HRQL; Health-related quality of life; NIV; Noninvasive ventilation;