Patients unable to walk 300 m or with a PAS 55 had higher mortality during the first 60 days with CABG ( HR : 3.24 ; 95 % CI : 1.64 to 6.83 ; p = 0.002 ) and no significant benefit from CABG during total follow-up ( HR : 0.95 ; 95 % CI : 0.75 to 1.19 ; p = 0.626 ; interaction p = 0.167 ) .