Fig. 3From: Trends in survival during the pandemic in patients with critical COVID-19 receiving mechanical ventilation with or without ECMO: analysis of the Japanese national registry dataSurvival curve analysis for predicting mortality in patients with severe COVID-19 receiving mechanical ventilation. A Survival curve for age, with a cutoff of 66 years; B for sex; C for body mass index, with a cutoff of 25; and D for the number of mechanical ventilations experienced at an institution for patients with severe COVID-19, with a cutoff of 62 cases. COVID-19, coronavirus disease 2019Back to article page