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William J.  Blot

William J. Blot, Ph.D.

Associate Director for Population-Based Research
Professor of Medicine (Epidemiology)

Contact Information:

International Epidemiology Institute
1455 Research Blvd.; Suite 550
Rockville, MD 20850


Dr. William Blot is professor of Medicine at Vanderbilt University School of Medicine and chief executive officer of the International Epidemiology Institute, a biomedical research firm with offices in Rockville, Md., and Jacksonville, Fla., involved in the design, conduct and analysis of epidemiologic studies into the causes of cancer and other diseases. Prior to co-founding IEI in 1994, Blot directed research into the causes of cancer for 20 years at the National Cancer Institute, where he was chief of the Analytic Studies Section of the Environmental Epidemiology Branch and then chief of the Biostatistics Branch.


Blot has conducted research toward identification and quantification of environmental causes of many cancers. He has mapped the distribution of mortality from cancer across the United States, assessed changing trends over time, and described the magnitude of cancer in the American population. His analytical research in the United States and abroad has helped clarify the contributions of demographic, occupational, dietary, lifestyle (including tobacco and alcohol consumption) medical and other factors as causes of cancers of the oral cavity and pharynx, esophagus, stomach, lung, kidney and other organs. He has led various multi-center, case-control and cohort epidemiologic studies and directed large-scale clinical trials on the effects of dietary supplements on disease prevention.

He currently directs the Southern Community Cohort Study, supported by the NCI, the Martell Foundation and others, the largest epidemiologic study yet undertaken to assess reasons for racial disparities in cancer incidence and mortality.