Immunogenicity of recombinant hepatitis B virus vaccine in patients with and without chronic hepatitis C virus infection: A case-control study

Table 1 Characteristics of patients and controls (mean ± SD)

Characteristic	Patient group(n = 38)	Control group(n = 40)	P
Age (yr)	41.1 ± 10.3 a	34.2 ± 14.2	0.017
Male/Female	30/8 b	20/20	0.010
BMI (kg/m2)	24.8 ± 4.7	24.3 ± 4.9	0.691
Smoking n (%)	25 (65.8) b	3 (7.5)	< 0.001
Alcohol n (%)	6 (15.8)	1 (2.5)	0.054
History of iv drug use n (%)	9 (23.7) b	0 (0)	0.001

^aP < 0.05,

^bP < 0.01 vs control group.