Blood DNA methylation markers in prospectively identified hepatocellular carcinoma cases and controls from Taiwan

Table 1 Sociodemographic characteristics of hepatocellular carcinoma cases and matched controls

Variable	Cases	%	Controls	%	P
	n = 159		n =312
Age (yr, mean, SD)	52.8 (8.0)		53.1 (7.8)		0.72
BMI (mean, SD)	24.3 (3.6)		24.8 (3.7)		0.13
Gender
Female	77	48	148	47	0.92
Male	82	52	164	53
HBsAg
Negative	65	41	238	76	< 0.0001
Positive	93	59	72	23
Missing	1	< 1	2	< 1
Anti-HCV
Negative	109	69	243	78	< 0.0001
Positive	29	18	15	5
Missing	21	13	54	17
Smoking
Never	97	61	184	59	0.67
Ever	62	39	128	41
Alcohol
Never	130	82	276	89	0.046
Ever	29	18	36	12

HBsAg: Hepatitis B virus surface antigen; BMI: Body mass index; HCV: Hepatitis C virus.