Table 2.

Environmental risk factors for HCV seropositivity among blood donors from southern Brazil

Variable	% cases (n = 178)	% controls (n = 356)	Unadjusted OR (95%CI)	Adjusted OR (95%CI)*
Lived in shelter/boarding school	11.2	6.7	1.8 (0.9–3.4)	1.9 (1.0–3.6)
P value			0.08	0.07
Household contact with jaundice or hepatitis	18.5	14.0	1.3 (0.8–2.3)	1.6 (0.2–2.6)
P value			0.2	0.08
Incarceration	11.8	2.0	6.7 (2.6–17.7)	5. 2 (2.1–12.8)
P value			<0.0001	0.0003
Enrolled in the army	24.7	27.5	0.8 (0.6–1.3)	0.9 (0.6–1.4)
P value			0.5	0.6
Worked at detention center or prison	2.2	2.5	0.8 (0.2–3.2)	0.8 (0.2–2.7)
P value			0.8	0.7
Occupational blood exposure	7.9	9;8	0.8 (0.4–1.6)	0.6 (0.3–1.3)
P value			0.5	0.2

^*OR adjusted for age, schooling, living in a shelter/boarding school and incarceration.