At 12 months , the difference in the primary endpoint of TLF between BP-SES ( 6.3 % ) and DP-SES ( 6.1 % ) groups was 0.25 % ( 95 % confidence interval : -1.67 % to 2.17 % , p for noninferiority = 0.0002 ) , demonstrating noninferiority of BP-SES to DP-SES .