Variables Vaccination
(n=41)
Placebo
(n=39)
P value
Male gender 63.4 64.1 0.94
Age (year)     0.97
             <25 9.8 7.7
             25<, 35> 34.1 33.3
             35<, 45> 26.8 30.8
             45< 29.3 28.2
BMI (Kg/m2)     0.17
             <18 51.2 30.8
             18<, 25> 26.8 35.9
             25< 22.0 28.2
Smoking 9.8 7.7 0.74
Past surgical history 48.8 46.2 0.81
High risk behaviors * 9.8 0.5 0.17
Family history of hepatitis 56.1 46.2 0.37
* High risk behaviors include tattoo, blood transfusion, intra venous drug use and leech. All the results are expressed as percentage.
Table 1: Demographic characteristics and clinical data of the participants.