On multivariate regression analysis , the most significant determinants for actual discontinuation of DAPT were Endeavor zotarolimus-eluting stent implantation with 3-month DAPT ( OR = 5.54 , 95 % CI 2.95-10 .44 , p < 0.001 ) and timing of request ( OR = 2.84 , 95 % CI 1.97-4 .11 , p < 0.001 ) .