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. 2022 Feb 10;59(2):2102463. doi: 10.1183/13993003.02463-2021

FIGURE 1.

FIGURE 1

a) Cox model including relevant factors and its association with hospital mortality in critically ill COVID-19 patients with extracorporeal respiratory support. Kaplan–Meier survival estimates according to b) pre-ECMO mechanical ventilation days, c) age categories and d) centre case volume. HR: hazard ratio; ECMO: extracorporeal membrane oxygenation; MV: mechanical ventilation; PaO2: arterial oxygen tension; PaCO2: arterial carbon dioxide tension; FIO2: fraction of inspired oxygen; bpm: breaths per min; Fr: french; PEEP: positive end-expiratory pressure.