Abstract
Cheng and colleagues1 have studied the effect of previous coronary stenting on subsequent multivessel coronary artery bypass grafting (CABG) outcomes using the Taiwan's National Health Insurance administrative database between 2000 and 2013. From a pool of 32,335 patients of whom 3028 had previous coronary stenting, the authors were able to obtain 2977 propensity score–matched pairs. It is unclear why they included “discharge medication” in their propensity score, which selected patients without previous stenting more likely to require clopidogrel, statin, or angiotensin-converting enzyme inhibitors/angiotensin receptor blockers treatment, like patients with recent myocardial infarction.
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