In pre-specified stratified analyses of the primary endpoint , biodegradable polymer sirolimus-eluting stents were associated with improved outcome compared with durable polymer everolimus-eluting stents in the subgroup of patients with ST-segment elevation myocardial infarction ( @ -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- , RR @ , @ % CI @-@ , p = @ , p for interaction = @ ) .