At late angiography ( median 249 days ; 92 % of eligible patients ) , patients in the EES arm had a significantly larger minimal lumen diameter ( 2.36 0.6 mm vs. 2.01 0.6 mm , p < 0.001 ; absolute mean difference : 0.35 mm ; 95 % confidence interval [ CI ] : 0.16 to 0.53 ) and a lower percent of diameter stenosis ( 13 17 % vs. 25 20 % , p < 0.001 ) .