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Stephen Duffy Queen Mary University of London, UK

Stephen Duffy is a statistician by training, educated at the University of Edinburgh and Imperial College London. He has worked in the United Kingdom, Singapore, France, Sweden, and Russia. For the last three decades, his research has been mainly in cancer epidemiology, prevention, and screening. He worked on the pioneering Swedish Two-County Trial of breast cancer screening, on which the United Kingdom’s national breast screening program is based. Since then, he has taken a major role in a number of other trials of cancer screening, in breast, colorectal, and lung cancer. These include the U.K. Trial of Flexible Sigmoidoscopy, whose results changed national policy within weeks of publication, and the FH01 study of annual mammography in young women at enhanced familial risk of breast cancer, which contributed to the National Institute of Clinical Excellence guidelines on breast cancer risk management.