A polymorphism within ErbB4 is associated with risk for hepatocellular carcinoma in Chinese population

Table 3 Stratification analysis based on hepatitis B virus infection status in cases and controls

Genotype	HBV positive					HBV negative
	Case	%	Control	%	OR1 (95% CI)	Case	%	Control	%	OR1 (95% CI)
12N ins/ins	82	40.8	14	53.8	1.00 (Reference)	28	40.6	127	52.0	1.00 (Reference)
12N ins/del	88	43.8	10	38.5	1.51(0.57-3.91)	30	43.5	90	36.9	1.52 (0.79-2.94)
12N del/del	31	15.4	2	7.7	2.64 (0.51-17.59)	11	15.9	27	11.1	1.87 (0.74-4.54)
Ptrend					P = 0.156					P = 0.083

¹Adjusted for sex, age, smoking status, drinking status and tumor stage. HBV: Hepatitis B virus; OR: Odds ratio; CI: Confidence interval.