Table 1. Association of plasma/blood donation and HIV, hepatitis C virus (HCV), or dual infection in residents of rural Shanxi Province, China.

Infection	Donors (n = 904, %)	Non-donors (n = 2158, %)	Crude OR (95% CI)	P
HIV	37 (4.1)	3 (0.1)	30.7 (11.1–127.2)	< 0.001
HCV	288 (31.9)	101 (4.7)	9.5 (7.5–12.2)	< 0.001
Co-infection	34 (3.8)	0 (0.0)	ND	< 0.001a

OR, odds ratio; CI, confidence interval; ND, not defined.

^aFisher's exact test.