patients under long-term aspirin therapy compared with
those who were not under aspirin therapy (nor using
other oral anticoagulant drugs) or those whose aspirin
therapy had been suspended before tooth extraction; (4)
containing at least one of the outcomes of interest (rates
of hemorrhage and BT); and (5) at least 10 patients of
each group included. Two investigators (BJZ and YBD)
independently judged study eligibility. Disagreements
were resolved through discussion. The study selection
procedure, based on the Preferred Reporting Items for
Systematic Reviews and Meta-Analyses (PRISMA)
guidelines,11,12 is illustrated in Figure