Features of sporadic acute hepatitis.

*Significantly different from HE (P<0.05). HE, hepatitis E; AHB, acute hepatitis B; HB, hepatitis B; AH: acute hepatitis; HBsAg +, hepatitis B surface antigen positive. Risk of HE is higher among HBsAg positive than negative subjects (OR = 2.5, 95%CI 1.5- 4.2), while the two groups of patients were of similar gender and age distribution and similar respect to severity of illness.