After a median follow-up of 10.1 years , the addition of docetaxel did not significantly improve DFS or OS ( hazard ratio ( HR ) = 0.91 , 95 % confidence interval ( CI ) = 0.81-1 .04 ; P = 0.16 and HR = 0.88 , 95 % CI = 0.76-1 .03 ; P = 0.11 , respectively ) .