Fig. 2

Receiver operator characteristic curve of SIRS, qSOFA, qSIRS, APPLEfast, qSOFA-lactate, qSOFA-CRP model. The individual area under the receiver operating characteristic curve (AUROC) values are as follows: SIRS (AUROC 0.53, 95% CI 0.44–0.62), qSOFA (AUROC 0.65, 95% CI 0.55–0.73), APPLEfast (AUROC 0.61, 95% CI 0.52–0.70), qSIRS (AUROC 0.67, 95% CI 0.52–0.75),qSOFA-lactate (AUROC 0.70, 95% CI 0.61–0.77), and qSOFA-CRP (AUROC 0.76, 95% CI 0.68–0.83).; ROC, receiver operating characteristic curve; SIRS, systemic inflammatory response syndrome; qSOFA, quick sequential organ failure score; qSIRS, SIRS + qSOFA; APPLEfast, acute patient physiologic and laboratory evaluation score; qSOFA-lactate, modified qSOFA with lactate criteria added; qSOFA-CRP, modified qSOFA with CRP criteria added; CRP, C-reactive protein