The Role of Serum Procalcitonin, Interleukin-6, and Fibrinogen Levels in Differential Diagnosis of Diabetic Foot Ulcer Infection

Table 4

Sensitivity, specificity, negative predictive value, and positive predictive value of inflammatory marker.

	Cut-off	Sensitivity	Specificity	Positive predictive value	Negative predictive value
CRP (mg/L)	≥28	100.00	97.37	97.40	100.00
Fibrinogen (mg/dL)	≥480	89.47	92.11	91.90	89.70
IL-6 (pg/mL)	≥105.8	76.32	94.74	93.50	80.00
ESR (mm/h)	≥42	73.68	84.21	82.40	76.20
WBC (10^3 μ/L)	≥11.6	71.05	90.70	87.10	78.00

CRP: C-reactive protein; IL-6: interleukin-6; WBC: white blood cell; ESR: erythrocyte sedimentation rate; PCT: procalcitonin.