Episode 376: 387. Methods Monday and an Example of Subgroup Analysis

https://www.nejm.org/doi/full/10.1056/NEJMoa2405923?query=clinical-medicine Mineralocorticoid receptor antagonists have been shown to reduce mortality in patients after myocardial infarction with congestive heart failure. Whether routine use of spironolactone is beneficial after myocardial infarction is uncertain.  Recent attempts to improve outcomes with intensified renin–angiotensin–aldosterone inhibition have not shown improvements in outcomes.7,8 A trial of routine aldosterone antagonism with spironolactone in addition to standard therapy among 1603 patients after myocardial infarction without heart failure showed no improvement in outcomes.9  https://pubmed.ncbi.nlm.nih.gov/27102506/   “ In a non-pre-specified exploratory analysis, the odds of death were reduced in the treatment group (3 [0.5%] vs. 15 [2.4%]; HR: 0.20; 95% CI: 0.06 to 0.70) in the subgroup of ST-segment elevation MI (n = 1,229), but not in non-ST-segment elevation MI (p for interaction = 0.01).”’ However, there was a significant reduction in mortality in the subgroup of 1229 patients with ST-segment elevation myocardial infarction (STEMI), a finding that highlights the need for a large trial.  We conducted the CLEAR trial to evaluate whether routine use of spironolactone is beneficial in patients after myocardial infarction.