What is the purpose of the IPD meta-analysis discussed in the context?
The purpose of the IPD meta-analysis discussed in the context is to compile subgroup data from 10 major beta-blocker mortality trials. It includes 4 studies comparing carvedilol and placebo; 2 studies comparing metoprolol and placebo; 2 studies comparing bisoprolol and placebo; 1 study comparing nebivolol and placebo; and 1 study comparing bucindolol and placebo.