tokens: There was also an excess of MB in warfarin users vs nonusers with ICH ( OR , 2 . 7 ; 95 % CI , 1 . 6 - 4 . 4 ; P < 0 . 001 ) but none in warfarin users with IS / TIA ( OR , 1 . 3 ; 95 % CI , 0 . 9 - 1 . 7 ; P = 0 . 33 ; P difference = 0 . 01 ) .