Groups 1 and 2 each had high rates of SVR12 , which were noninferior to the reported rate of response to the combination of telaprevir , peginterferon , and ribavirin ( group 1 : 96.6 % ; 95 % confidence interval , 92.8 % -100 % ; and group 2 : 100 % ; 95 % confidence interval , 95.9 % -100 % ) .