Figure 5From: Multinational, observational study of procalcitonin in ICU patients with pneumonia requiring mechanical ventilation: a multicenter observational studyReceiver operator characteristic (ROC) curve for 28-day mortality prediction. Areas under the curve: maximum PCT 0.74 (95% CI: 0.65 to 0.83), initial PCT 0.70 (95% CI: 0.60 to 0.80), and APACHE II 0.69 (95% CI: 0.59 to 0.78).Back to article page