Table 1.

Influence of ABO blood groups on HBs serology

	HBs Ag +	HBs Ag –	OR	IC (95%)	P
O	2,044	27,578	0.99	[0.13–1.05]	0.17
Others (A, B, AB)	2,075	27,630
A	947	12,299	1.04	[0.96–1.12]	1.13
Others (O, B, AB)	3,172	42,909
B	941	12,943	0.99	[0.92–1.07]	0.09
Others (O, A, AB)	3,178	43,206
AB	187	2,575	0.98	[0.84–1.14]	0.1
Others (O, A, B)	3,932	52,820