However , survival to hospital discharge was similar among the intervention and control groups among patients with VF ( @ % -LSB- @ % CI , @ % -@ % -RSB- vs @ % -LSB- @ % CI , @ % -@ % -RSB- , respectively ; P = @ ) and among patients without VF ( @ % -LSB- @ % CI , @ % -@ % -RSB- vs @ % -LSB- @ % CI , @ % -@ % -RSB- , respectively ; P = @ ) .