Using intention-to-treat analysis , we found that the incidence rate of PLC and the mortality rates of severe end-stage liver diseases and infant fulminant hepatitis were significantly lower in the vaccination group than the control group with efficacies of 84 % ( 95 % CI 23 % -97 % ) , 70 % ( 95 % CI 15 % -89 % ) , and 69 % ( 95 % CI 34 % -85 % ) , respectively .