When considering `` on treatment '' factors , @ log@ HCV RNA decline at week @ ( @ , @ % CI : @-@ @ , P = @ ) and achievement of RVR BOC ( @ , @ % CI : @-@ @ , P = @ ) were significantly related with the SVR , although RVR BOC only ( @ , @ % CI : @-@ @ , P = @ ) maintained significance at multivariate logistic regression analysis .