Table 2.

 Relationship between the principal genotypes and the putative source of infection

	Genotype					p Value
	1a (73)	1b (153)	2 (63)	3 (54)	4 (20)
Transfusions (104) (n (%))	19 (18)	59 (57)	23 (22)	3 (3)	0	<0.001*
Surgery, other procedures (16) (n (%))	3 (19)	5 (31)	8 (50)	0	0	nd
Infected mother (198) (n (%))	42 (21)	68 (35)	24 (12)	44 (22)	20 (10)	<0.001
Drug abuser (81) (n (%))	23 (28.5)	14 (17.5)	5 (6)	26 (32)	13 (16)
Other/unknown (45) (n (%))	9 (20)	21 (46.5)	8 (18)	7 (15.5)	0	nd

*Genotypes 3 and 4 pooled for analysis.