Overall , 87 of 1152 patients ( 7.6 % ) in the buffered crystalloid group and 95 of 1110 patients ( 8.6 % ) in the saline group died in the hospital ( absolute difference , -1.0 % [ 95 % CI , -3.3 % to 1.2 % ] ; RR , 0.88 [ 95 % CI , 0.67 to 1.17 ] ; P = .40 ) .