Abstract
To the Editor: Nylen and colleagues reported that physical fitness, as represented by exercise capacity, reduces the risk of mortality in people with diabetes mellitus regardless of age.1 I compliment the authors on their excellent study. I would also like to mention that data were reported from a study of 609 people with diabetes mellitus with a mean age of 70 with no history of coronary artery disease who were referred for an exercise treadmill sestamibi stress test because of chest pain or dyspnea.2 At 47-month follow-up, stepwise Cox regression analysis showed that a predicted exercise capacity of greater than 85% was a significant independent predictor of time to development of myocardial infarction, stroke, or death (hazard ratio=0.52, 95% confidence interval=0.34–0.78; P=.002). Older persons with diabetes mellitus with a predicted exercise capacity of greater than 85% had a 48% lower chance of myocardial infarction, stroke, or death than those with a predicted exercise capacity of 85% or less. Conflict of Interest: The editor in chief has reviewed the conflict of interest checklist provided by the author and has determined that the author has no financial or any other kind of personal conflicts with this paper. Author Contributions: WSA wrote the letter to the editor. Sponsor's Role: There is no sponsor.
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