Table 2.

Analysis of variables associated with infection by the hepatitis B virus in 984 first-time candidate blood donors of Southwestern Goias

Variable		HBV	%	ORb	p-value
		Pos/Totala		(Cl 95%)c
Clinical screening
	Fit donor	21/578	3.6	1.0
	Unfit donor	47/406	11.6	3.4 (2.0-5.9)	0.000
Gender
	Male	34/547	6.2	1.0
	Female	34/437	7.8	0.7 (0.5 - 1.3)	0.34
Age (years)
	18- 20	15/244	6.1	1.0
	21-30	16/243	6.6	1.1 (0.5-2.4)
	31-40	13/217	6.0	1.0 (0.4-2.2)	0.39d
	41-50	11/119	9.2	1.5 (0.6-3.7)
	51-60	9/92	9.8	1.7 (0.6-4.2)
	>60	4/69	5.8	0.9 (0.3-3.2)
Transfusion history
	No	55/897	6.1	1.0
	Yes	13/87	14.9	2.68 (1.4-5.1)	0.002
Prior surgery
	No	67/974	6.9	1.0
	Yes	1/10	10.10	1.5 (0.2- 12)	0.69
Previous Hospitalization
	No	65/950	6.8	1.0
	Yes	3/34	8.8	1.3 (0.4-4.4)	0.65
Piercing or tattoos
	No	28/603	4.6	1.0
	Yes	40/381	10.5	2.4 (1.4-4.0)	0.000
Illicit drug use
	No	56/915	6.1	1.0
	Yes	12/69	17.4	3.2 (1.6-6.4)	0.000
History of abortion
	No	28/381	7.3	1.0
	Yes	6/55	10.9	1.5 (0.6-3.9)	0.36
Unprotected sex
	No	40/798	5.0	1.0
	Yes	28/186	15.1	3.4 (2-5.6)	0.000
Sexual partner with hepatitis		59/964	6.1	1.0
	No	4/7	57.1	20.4 (4.5 - 93.5)	0.000
	Yes
History of prostitution
	No	56/931	6.0	1.0
	Yes	12/53	22.6	4.6 (2.3-9.2)	0.000
History of sexually transmitted disease
	No	51/903	5.6	1.0
	Yes	17/81	21.0	4.4 (2.4-8.1)	0.000
HIV testing
	No	65/961	6.8	1.0
	Yes	3/23	13.0	2.0 (0.6-7.1)	0.24
Prison sentence
	No	64/970	6.6	1.0
	Yes	4/14	28.6)	5.7 (1.7- 18.5)	0.000

^adenominator reflects the number of valid responses; ^bOR: Odds Ratio; ^c Cl: confidence interval; ^dchi-squared for trend