At @ days after randomisation , median maximum relative change in creatinine concentrations was @ % ( IQR @-@ ) in the alert group and @ % ( @-@ ) in the usual care group ( p = @ ) ; @ ( @ % ) patients in the alert group and @ ( @ % ) patients in usual care group had received dialysis ( odds ratio @ -LSB- @ % CI @-@ -RSB- ; p = @ ) ; and @ ( @ % ) patients in the alert group and @ ( @ % ) patients in the usual care group had died ( @ -LSB- @-@ -RSB- ; p = @ ) .