Why was an observational study selected to evaluate the primary research questions?
Looking at the characteristics that were measured at the beginning of the study, what were some of the main differences between the patients who took beta blockers and those who did not?
How did the researchers try to create greater balance between these cohorts and more fairly examine the impact of using beta blockers?
Do the steps taken to create balanced cohorts eliminate the concerns? What limitations remain?
What were the important findings of the study, and how would they impact the choices of medical doctors with regard to using beta blockers?
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