At 9 months , in-segment late lumen loss in the PCB group was noninferior to that of the paclitaxel-eluting stent group ( 0.46 0.51 mm vs. 0.55 0.61 mm ; difference : -0.06 mm with 95 % confidence interval : -0.23 to 0.10 ; p for noninferiority = 0.0005 ) .