For this analysis, an RR < 1.0 favoured
the continuation of the usual warfarin,
a RR > 1.0 favoured the discontinuation
or alteration of the warfarin dose,
whereas an RR of 1.0 indicated equivalence between the
2 groups.The risk of bleeding
with the continuation of warfarin
compared with that for the discontinuation
or reduction of the dose of
warfarin was expressed as a relative
risk (RR) with an associated 95% CI.