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Figure 2: Kaplan–Meier plots demonstrating HFNC success probability stratified at different time intervals after HFNC treatment; (a) ROX score at 2 h. (b) ROX score at 6 h. (c) ROX score at 12 h. (d) ROX score at 18 h. ROX – Respiratory rate-oxygenation; HFNC – High-flow nasal cannula

Figure 2: Kaplan–Meier plots demonstrating HFNC success probability stratified at different time intervals after HFNC treatment; (a) ROX score at 2 h. (b) ROX score at 6 h. (c) ROX score at 12 h. (d) ROX score at 18 h. ROX – Respiratory rate-oxygenation; HFNC – High-flow nasal cannula