Table 1. Correlation between procalcitonin and other measurements among 1,468 patients with suspected infection.

Patient group (ng/mL)	C reactive protein (mg/L)	WBC	NLR	NLR cutoff suggested by Gürol et al.
Procalcitonin <0.05	29±42	9±3	4±4	<5
Procalcitonin 0.05–0.5	70±67	11±5	6±9	5–10
Procalcitonin 0.5–2	121±102	14±11	12±14	10–13
Procalcitonin 2–10	138±114	13±8	13±7	13–15
Procalcitonin >10	161±146	16±12	17±10	>15

WBC, white blood count; NLR, neutrophil to lymphocyte ratio.