Beyond 2 years from randomisation , hazard ratios ( HRs ) were significantly reduced for both AFS ( adjusted HR 0.37 ; 95 % CI 0.17 to 0.77 ; p = 0.008 ) and OS ( HR 0.34 ; 95 % CI 0.17 to 0.71 ; p = 0.004 ) for surgery relative to angioplasty .
