Fig. 2

Kaplan-Meier survival curve of PERT-alerted and non-PERT-alerted patients during the PERT-era (a) distribution of PESI scores in the 2 groups (b) and prevalence of severity of markers among the 2 groups (c). Hi-Flo, high-flow oxygen nasal cannula, high flow oxygen (> 15 L per minute); MV, mechanical ventilation, hypotension is defined as systolic blood pressure between 100-110mmHG and 40 mmHg lower than at baseline; shock is defined as hypotension requiring vasopressor medication. * p < 0.001 by Chi square test