Mortality rates in the HES versus Ringer 's groups at @ months were @ ( @/@ patients ) versus @ % ( @/@ ) -LSB- relative risk @ ; @ % confidence interval ( CI ) @-@ @ ; P = @ -RSB- , respectively ; at @ year , @ ( @/@ ) versus @ % ( @/@ ) ( @ ; @ % CI @-@ @ ; P = @ ) , respectively ; at the time of longest follow-up , @ ( @/@ ) versus @ % ( @/@ ) ( @ ; @ % CI @-@ @ ; P = @ ) , respectively .