for these patients , warfarin therapy for more than six weeks was not associated with a lower risk of recurrent thromboembolism when compared with warfarin therapy for one through six weeks ( risk of recurrence for seven to 26 weeks of treatment 0.8 ; 95 percent confidence limits 0.3 and 2.5 ; risk of recurrence for more than 26 weeks of treatment 1.1 ; 95 percent confidence limits 0.4 and 3.1 ) .
C0040038
thromboembolism
C0043031
warfarin