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John A. Baron, M.D.

Active Emeritus Professor of Medicine
Professor of Epidemiology
Professor of Community and Family Medicine

Community and Family Medicine

Stanford University, MS 1968
University of London, MSC 1981
University of Michigan, MD 1976
Yale University, BA 1967

Norris Cotton Cancer Center


Contact Information:

Department of Epidemiology
One Medical Center Drive
Rubin Building, 7927
Lebanon NH 03756

Office: 603-653-9953
Email: John.A.Baron@Dartmouth.edu

Professional Interests:

Dr. Baron has been active in epidemiological research since 1981, with interests in sex hormone-related diseases (eg. osteoporosis, breast cancer, prostate cancer), cigarette smoking, administrative data sets, clinical epidemiology, and cancer prevention. Major projects have focused on the investigation of orthopedic epidemiology using Medicare data, cancer prevention trials, and etiological epidemiology.

Courses Taught:

Clinical Epidemiology at the New England Epidemiology Institute

Courses in Clinical Epidemiology in Sweden, Denmark, Italy and the Netherlands

Selected Publications:


  • Baron JA, Cole BF, Sandler RS, Haile RW, Ahnen D, Bresalier B, McKeown-Eyssen G, Summers R. et al. A randomized trial of aspirin to prevent colorectal adenomas. N Engl J Med 2003; 348:891-9

  • Grau MV, Baron JA, Sandler RS, Wallace K, Haile RW, Church TR, Beck GJ, Summers RW, Barry EL, Cole BF, Snover DC, Rothstein R, Mandel JS. Prolonged effect of calcium supplementation on risk of colorectal adenomas in a randomized trial. J Natl Cancer Inst 2007; 99:129-36

  • Cole BF, Baron JA, Sandler RS, Haile RW, Ahnen DJ, Bresalier RS, et al. Folic acid for the prevention of colorectal adenomas. A randomized clinical trial. JAMA 2007; 297: 2351-2359.

  • Lindor NM, Rabe K, Petersen G, Haile R, Casey G, Baron J, et al. Lower cancer incidence in Amersterdam-I criteria families without mismatch repair deficiency. .JAMA 2005; 293:1979-1985.

  • Sørensen HT, Mellemkjaer L, Olsen JH, Baron JA. Prognosis of cancers associated with venous thromboembolism. N Engl J Med 2000; 343:1846-1850.