MME and hydrops fetalis: Similarly, age (P‐value for subgroup differences = 0.55), sex (P‐value for subgroup differences = 0.49), and angiotensin receptor/neprilysin inhibitor use (P‐value for subgroup differences = 0.52) were not found to modify the treatment effect on the composite endpoint of first HF hospitalization or cardiovascular death amongst the HFrEF population.