Figure 3.
Primary analyses of mortality according to high-flow nasal cannula (HFNC) exposure, stratified by degree of hypoxemia. Similar to Figure 2, these Kaplan-Meier curves depict cumulative survival in patients with any HFNC exposure and in HFNC patients not intubated within 6 hr of admission as well as their respective matched controls. However, in this iteration, patients have also been matched by their degree of hypoxemia (ratio of oxygen saturation/Fio2 [S/F] > 200 or < 200). p value of less than 0.05 for comparison between the more hypoxemic HFNC patients not intubated within 6 hr of admission and their matched controls. aHR = adjusted hazard ratio.