Fig. 1
From: Efficacy and safety of nasal high-flow oxygen in COPD patients
Enrollment of normocapnic and hypercapnic COPD patients in STIT-1 and STIT-2. 200 patients with COPD GOLD IV were screened for study inclusion. The final study population comprised a single cohort of 77 stable COPD patients, who were already treated by conventional long term oxygen treatment (LTOT), then awaiting a potential inclusion into the subsequent HFOT studies STIT-1 and -2 (Short Time TNI Treatment)