Letters Section Editor: Robert M. Golub, MD, Senior Editor.
To the Editor: The article by Dr Shishehbor and colleagues1 demonstrated that impaired functional capacity and abnormal heart rate recovery following exercise testing accounted for a major proportion of the association between socioeconomic status (SES) and all-cause mortality. The SES gradient in certain health-related behaviors such as smoking and diet are well established, although less so for physical activity. Thus, these data highlight an important aspect of public health research that is often neglected.
Hamer M. Mediators of the Association Between Mortality Risk and Socioeconomic Status. JAMA. 2006;296(7):763-764. doi:10.1001/jama.296.7.763-a