Comparison of CRP, Procalcitonin, Neutrophil Counts, Eosinophil Counts, sTREM-1, and OPN between Pneumonic and Nonpneumonic Exacerbations in COPD Patients

Table 3

The area under the curve, sensitivity, specificity, predictive values, and cutoff values of CRP, PCT, Neu, and OPN.

Variable	AUC	Cutoff	Sensitivity (%)	Specificity (%)	Predictive values Positive	Negative
CRP	0.797	15.8 mg/dL	0.79	0.74	0.64 (47/74)	0.84 (80/95)
PCT	0.678	0.07 ng/mL	0.64	0.76	0.57 (39/68)	0.77 (78/101)
Neu	0.630	6.4110^9/L	0.54	0.75	0.56 (33/59)	0.74 (81/110)
OPN	0.622	13.26 ng/mL	0.73	0.53	0.47 (40/86)	0.73 (61/83)