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 study could not be included in the analysis for this outcome because no incidents of clinically significant nonmajor bleeding were reported.