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

Table 7

The comparison of the distribution of the parameters between the periprosthetic fluid and the plasmatic referred reference interval (chi-square or Fisher’s exact test was used when indicated).

Parameter	Unit	Plasmatic reference interval	Median value in fluid			value
25-OH	ng/mL	30.0-100.0	18.5	26 (81%)	/	<0.001
PCT	ng/mL	0.00-0.50	0.04	/	3 (9%)	<0.001
Ferritin	ng/mL	20-250	346	/	22 (69%)	<0.001
LDH	IU/L	125-243	3791	/	32 (100%)	<0.001
Total protein	g/L	60.0-80.0	46.3	26 (81%)	1 (3%)	<0.001
CRP	mg/dL	0.01-0.50	0.17	/	4 (13%)	0.190
β-2 microglobulin	mg/L	0.97-2.64	1.60	/	1 (3%)	0.344