Over a median follow-up period of 43 months ( interquartile range , 31 to 55 ) , the rate of the primary composite end point did not differ significantly between participants who underwent stenting in addition to receiving medical therapy and those who received medical therapy alone ( 35.1 % and 35.8 % , respectively ; hazard ratio with stenting , 0.94 ; 95 % confidence interval [ CI ] , 0.76 to 1.17 ; P = 0.58 ) .