Letter by Xue et al Regarding Article, “Myocardial Injury After Noncardiac Surgery and Its Association With Short-Term Mortality”
To the Editor:
We read with interest the article by van Waes and colleagues1 assessing the association between myocardial injury and 30-day postoperative mortality in intermediate- to high-risk noncardiac surgery patients aged ≥60 years. Strengths of this study include the large sample of patients at older ages and the adjustment for many known factors that can affect postoperative mortality. The authors used appropriate methods to assess the relationship between myocardial injury and postoperative mortality and openly discussed the limitations of their work.
However, we would like to know why the preoperative hemoglobin level and body mass index are not included in demographic data of patients. It has been shown that preoperative …