Study of Inflammatory and Infection Markers in Periprosthetic Fluid: Correlation with Blood Analysis in Retrospective and Prospective Studies

Table 6

Range of variability of the parameters and cutoff for stability adopted.

Parameter	Unit	Min	Max	Ratio max/min	Cutoff for stability
25-OH	ng/mL	<4.0	39.5	10	1/2 or ×2
PCT	ng/mL	<0.02	3.71	185	1/3 or ×3
Ferritin	ng/mL	71	2910	41	1/3 or ×3
LDH	IU/L	974	>6650	7	1/2 or ×2
Total protein	g/L	20.3	85.7	4	1/2 or ×2
CRP	mg/dL	0.03	1.10	37	1/3 or ×3
β-2 microglobulin	mg/L	<0.25	2.93	12	1/2 or ×2