Fig. 4From: The prevalence of non-invasive ventilation and long-term oxygen treatment in Helsinki University Hospital area, FinlandNIV-modes at treatment initiation. COPD, chronic obstructive pulmonary disease; NMD, neuromuscular disease; RCWD, restrictive chest wall disease; OHS, obesity-hypoventilation syndrome; ILD, interstitial lung disease; Misc, miscellaneous; NIV, non-invasive ventilation. *Misc group includes heart disease and cancer patientsBack to article page