Editorial: Epidemiologic Reviews 2013—Special Issue on the Epidemiology of Aging

The papers in this volume (1–13) reflect substantial and diverse epidemiologic research activity on some of the major health problems of older people. When the call for papers was announced, no particular themes within this vast field of the epidemiology of aging were suggested or encouraged. This led to a series of reviews covering a breadth of modern and important topics. These topics touch many disciplines that dovetail with the science of aging, including evaluating putative social and biological risk factors for age-related change and survivorship, identifying biological processes and modern biomarkers of aging, and exploring aging outcomes in older populations, such as the issue of multimorbidity among older Americans and mili-tary veterans in Canada and other countries. Several papers review risk factors for altered cognitive function an