Table 3.

Multivariate regression analysis of factors associated with hepatitis B infection.

	OR	95% CI	Adjusted p-value
HBsAg seropositivity among all subjects
Age (before 1986 vs after 1986)	0.00	0.00-	0.999
FIB-4	1.14	0.82–1.60	0.432
Supposed HCV RNA (positive vs negative)	0.29	0.16–0.53	5.5 × 10–5
HBV viremia among HBsAg (+) subjects
Anti-HCV (positive vs negative)	0.27	0.10–0.73	0.010
Anti-HDV (positive vs negative)	0.68	0.25–1.87	0.454

p.s. Supposed HCV RNA seropositivity included HCV viremia subjects and HCV non-viremia subjects induced by antiviral therapy.

HBsAg hepatitis B surface antigen; FIB-4 fibrosis-4 index; anti-HCV hepatitis C antibody; anti-HDV hepatitis D antibody.