Question

Antithrombotic drugs are used after coronary stenting to prevent stent thrombosis. A study was performed to compare the efficacy and safety of two antithrombotic drug regimens: Aspirin alone and Aspirin + Ticlopidine. The counts of adverse events are given below in the following table: Drug Regimen Number of events Total subjects administered drug Aspirin Alone 20 557 Aspirin + Ticlopidine 3 546 Given the results, is there an association between drug regimen and number of adverse events? State the null and alternative hypotheses to answer the research question, report your test statistic and p-value and interpret your results.

Answer 1