Prognostic value of soluble urokinase-type plasminogen activator receptor (suPAR). Box plot of (a) duration of mechanical ventilation and (b) length of stay in the ICU of burn-injury patients with inhalation trauma. Boxes represent the interquartile ranges. N, number of patients per group. Kaplan-Meier curves showing the rate of freedom from (c) mechanical ventilation and (d) ICU stay in burn-injury patients with systemic suPAR < 9.5 ng/ml and > 9.5 ng/ml. P values are given in each panel.