At 1 year , paclitaxel-eluting stents did not meet the criterion for noninferiority to everolimus-eluting stents with respect to the primary end point ( rate of target-vessel failure , 5.6 % vs. 2.9 % ; risk difference , 2.7 percentage points [ 95 % confidence interval , 0.8 to 4.5 ] ; relative risk , 1.89 [ 95 % confidence interval , 1.20 to 2.99 ] ; P = 0.38 for noninferiority ) .