Among aged beneficiaries , 1-year adherences to at least one heart failure drug were 63 % , 57 % , 53 % , 50 % , and 52 % for Whites , Asians , Hispanics , Native Americans and Blacks , respectively ; among the disabled , 1-year adherence was worse for each group : 57 % , 53 % , 48 % , 44 % and 43 % respectively .