Research Article

High-Flow Nasal Cannula versus Noninvasive Ventilation in AECOPD Patients with Respiratory Acidosis: A Retrospective Propensity Score-Matched Study

Figure 2

Kaplan–Meier curves for length of ICU stay (a), length of hospital stay (b), and total ventilation time (c) in HFNC success (red), HFNC failure (blue), and NIV (green) groups (log-rank test, for all).
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(b)
(c)