In the propensity score-matched prior MI cohort , after @ months of follow-up , - blocker use was associated with a @ % lower risk of the primary outcome ( @ -LSB- @ % -RSB- versus @ -LSB- @ % -RSB- ; hazards ratio , @ ; @ % confidence interval , @-@ @ ; P = @ ) , driven by a lower risk of recurrent MI ( @ -LSB- @ % -RSB- versus @ -LSB- @ % -RSB- ; hazards ratio , @ ; @ % confidence interval , @-@ @ ; P = @ ) with no difference in mortality ( @ -LSB- @ % -RSB- versus @ -LSB- @ % -RSB- ; P = @ ) .