Multivariable analysis showed that Coumadin ( Bristol-Myers Squibb , Princeton , NJ ; odds ratio -LSB- OR -RSB- , @ ; @ % confidence interval -LSB- CI -RSB- , @-@ @ ; P = @ ) , higher body mass index ( OR , @ ; @ % CI , @-@ @ ; P = @ ) , and the use of no conduit/material ( OR , @ ; @ % CI , @-@ @ ; P < @ ) were independently associated with wound complications .