The 90-day mortality was similar : 121 of 445 patients ( 27.2 % ) in the permissive-underfeeding group and 127 of 440 patients ( 28.9 % ) in the standard-feeding group died ( relative risk with permissive underfeeding , 0.94 ; 95 % confidence interval [ CI ] , 0.76 to 1.16 ; P = 0.58 ) .