Occult Infection in Aseptic Joint Loosening and the Diagnostic Role of Implant Sonication

Table 5

Preoperative blood tests (Chi-Square test).

Blood test		Any positive cultures		Totals	values
		Y	N
CRP; (normal <10 mg/L)	Normal	6	43	49	0.89
	High	1	6	7
ESR; (normal 1–20 mm/hr)	Normal	8	46	54	1
	High	0	0	0
WCC; (normal 4–11 × 10^9/L)	Normal	7	41	48	0.181
	Abnormal	1	1	2
Neutrophils; (normal 1.7–7.5 × 10^9/L)	Normal	7	41	48	0.407
	Abnormal	1	2	3