As shown in Fig. 2, clinically significant nonmajor
bleeding occurred in 15 of 275 (5.5%) patients who continued
their regular dose of warfarin and in 25 of 278
(9.0%) patients who discontinued or altered their dose
of warfarin before dental surgery. The risk of clinically
significant nonmajor bleeding was not significantly lower
for patients who discontinued or altered their warfarin
dose (RR = 0.71, 95% CI 0.39–1.28; p = 0.25; I2 = 0%). Data
from 1 study19 could not be included in the analysis for
this outcome because no incidents of clinically significant
nonmajor bleeding were reported.