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Commentary
November 24, 2010

The Evolution of Population ScienceAdvent of the Mega Cohort

Author Affiliations

Author Affiliations: Massachusetts Veterans Research and Information Center (MAVERIC), VA Boston Healthcare System; and Divisions of Aging, Cardiovascular Medicine, and Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts. Dr Gaziano is also Contributing Editor, JAMA.

JAMA. 2010;304(20):2288-2289. doi:10.1001/jama.2010.1691

As more attention and resources have been focused on the health of populations over the last 2 centuries, epidemiology has emerged as an essential tool for gaining knowledge about disease and reducing the associated burden. Driven by the discovery of biomarkers, the advent of DNA analysis, and high-powered statistical software, as well as numerous other technological advances, epidemiology has evolved to a point at which massive cohorts with hundreds of thousands of participants are needed. Each step in this evolution can be defined by an enabling technology that aided in a better understanding of exposure-disease relationships, and in many cases, to transformative changes in public health efforts related to health care delivery. This commentary describes this evolution, from early descriptive studies to the new mega cohorts of today.

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