Dear Sirs,
Research on sex difference in mortality after myocardial infarction (MI) since the 1990s has been debated and increased. Several observational studies have shown that younger women, in particular, seemed to have higher mortality rates than men of similar age during the two-year or longer follow-up, although these studies were mainly from the USA.1-3 Recent American studies have also found that, even after full adjustment for potential risk factors, excess risk for in-hospital mortality for women was still noted, particularly among those <50 years old with acute ST-segment elevation MI, leading to 98% (odds ratio [OR] 1.98, 95% c
