Table 3.

Best Predictive Value of Procalcitonin

	Thresholda (ng/mL)	AUCb	Sensitivity	Specificity	Positive Predictive Value	Negative Predictive Value	Accuracy
Procalcitonin	3.2	0.67 (0.63–0.71)	0.53	0.75	0.72	0.57	0.63

Abbreviation: AUC, area under the curve.

^a Threshold developed using Youden method.

^b AUC is area under curve (95% confidence interval).