Twenty-eight-day mortality was 4 patients in each group ( risk ratio 0.96 ; 95 % CI 0.27 to 4.45 ; P = 0.95 ) , and in-hospital mortality was 8 in the HES group vs. 5 patients in the lactated Ringer 's group ( hazard ratio 1.86 ; 95 % CI 0.56 to 6.19 ; P = 0.31 ) .