Procalcitonin Identifies Bacterial Coinfections in Vietnamese Children with Severe Respiratory Syncytial Virus Pneumonia

Table 2

Accuracy of diagnostic parameters regarding different cut-off points.

Sensitivity	0.73 (0.39-0.94)	0.55 (0.23-0.83)	0.63 (0.25-0.92)	0.25 (0.03-0.65)	0.64 (0.31-0.89)
Specificity	0.63 (0.49-0.75)	0.92 (0.81-0.97)	0.85 (0.72-0.94)	0.98 (0.89-1.00)	0.73 (0.60-0.84)
Positive predictive value (PPV)	0.28 (0.17-0.68)	0.55 (0.33-0.83)	0.42 (0.15-0.72)	0.67 (0.26-0.92)	0.30 (0.19-0.67)
Negative predictive value (NPV)	0.93 (0.75-0.96)	0.92 (0.73-0.97)	0.93 (0.81-0.99)	0.89 (0.44-1.00)	0.92 (0.73-0.95)
Positive likelihood ratio (LR+)	1.95 (1.19-3.19)	6.44 (2.38-17.45)	4.29 (1.80-10.20)	12.00 (1.23-117.41)	2.35 (1.27-4.33)
Negative likelihood ratio (LR-)	0.44 (0.16-1.16)	0.50 (0.26-0.95)	0.44 (0.18-1.08)	0.77 (0.51-1.15)	0.50 (0.23-1.11)
Accuracy	64.3%	84.3%	82.1%	87.5%	70.0%

PCT: procalcitonin; hs-CRP: high-sensitivity C-reactive protein; IL-6: interleukin-6.