Table 1. Associations Between Transfusion Transmitted Virus, Hepatitis C Virus, Hepatitis B Virus and Cytomegalovirus Infections, and Risk Factors ^a.

Viral Infections	Age	Gender	Blood-Group	Underlying Diseases	Chemotherapy
TT Virus	0.007	0.19	0.002	0.19	0.003
CMV	0.23	0.45	0.45	0.04	0.05
HCV	0.30	0.28	0.33	0.15	0.12
HBV	0.01	0.22	0.23	0.001	0.04

^aAbbreviations: TT Virus, Transfusion Transmitted Virus; CMV, Cytomegalovirus; HCV, Hepatitis C Virus; HBV, Hepatitis B Virus.