Diagnostic Accuracy of Procalcitonin, Neutrophil-to-Lymphocyte Ratio, and C-Reactive Protein in Detection of Bacterial Infections and Prediction of Outcome in Nonneutropenic Febrile Patients with Lung Malignancy

Table 3

Spearman correlations among the levels of PCT (ng/mL), CRP (mg/L), WBC (109/L), NEU (109/L), and NLR, measured within 48h of the onset of fever in bacteria-infected subgroup A.

	PCT	CRP	WBC	NEU	NLR
PCT
r	1.00	0.746	0.222	0.285	0.511
95% CI		0.605 to 0.838	−0.029 to 0.448	0.045 to 0.499	0.293 to 0.685
		<0.001	0.067	0.017	<0.001
CRP
r		1.00	0.176	0.258	0.497
95% CI			−0.058 to 0.398	0.031 to 0.469	0.297 to 0.666
			0.148	0.032	<0.001
WBC
r			1.00	0.978	0.547
95% CI				0.955 to 0.986	0.378 to 0.673
				<0.001	<0.001
NEU
r				1.00	0.682
95% CI					0.559 to 0.776
					<0.001
NLR
r					1.00
95% CI

r Correlation coefficient calculated using Spearman’s methods. TF: tumor fever; PCT: procalcitonin; CRP: C-reactive protein; WBC: white blood cell; NEU: neutrophil; NLR: neutrophil-to-lymphocyte ratio.