After a follow-up of median 10.3 years ( range 7.1-14 .8 ) , median PFS was 18.5 ( 95 % confidence interval ( CI ) 15.9-21 .0 ) months for PCw and 16.4 ( 95 % CI 13.5-19 .2 ) months for PC3w ( p = 0.78 ) .