Compared with placebo ( favorable outcome rate : @/@ -LSB- @ % ; @ % CI , @ % to @ % -RSB- ) , both erythropoietin groups were futile ( first dosing regimen : @/@ -LSB- @ % ; @ % CI , @ % to @ % -RSB- , P = @ ; second dosing regimen : @/@ -LSB- @ % ; @ % CI , @ % to @ % -RSB- , P < @ ) .