Table 2.

Characteristics of blood cultures.

	True bacteremia		Contamination		True negative		P
	n = 445		n = 164		n = 1532
Site, n (%)
CV catheter	14	(3.2)	20	(12.2)	22	(1.4)	< 0.001
Venous catheter	29	(6.5)	4	(2.4)	125	(8.2)	0.014*
Other	16	(3.6)	2	(1.2)	43	(2.8)	0.311*
Venous	146	(32.8)	14	(8.5)	571	(37.3)	< 0.001
Femoral	240	(53.9)	124	(75.6)	771	(50.3)	< 0.001
Antiseptics, n (%)
PVI	165	(37.1)	127	(77.4)	467	(30.5)	< 0.001
ACHX	274	(61.6)	35	(21.3)	1036	(67.6)	< 0.001
Other types	6	(1.4)	2	(1.2)	29	(1.9)	< 0.001
One pair	7	(1.6)	5	(3.1)	42	(2.7)	0.357*

ACHX, 1.0% alcohol/chlorhexidine gluconate; CV, central venous; Femoral, femoral artery or vein; Other types, alcohol and benzalkonium; Other, recently inserted arterial catheter and implanted port; PVI, 10% aqueous povidone-iodine; Venous, venipuncture without catheter insertion; Venous catheter, recently inserted venous catheter.

*Fisher exact test was performed because of small number of patients in several cells; other groups were analyzed by two-tailed χ² test.