Stephen Duffy

Profile

I am a statistician by training, educated at the University of Edinburgh and Imperial College, London. I have worked in the UK, Singapore, France, Sweden and Russia.

For the last three decades, my research has been mainly in cancer epidemiology, prevention and screening. I worked on the pioneering Swedish Two-County Trial of breast cancer screening, on which the UK's national breast screening programme was based.

Since then have taken a major role in a number of other trials of cancer screening, in breast, colorectal and lung cancer. These include the UK 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 NICE guidelines on breast cancer risk management.

Research

I am currently Director of the Policy Research Unit in Cancer Awareness, Screening and Early Diagnosis, funded by the Department of Health.

It is a collaboration between researchers from seven institutions (Queen Mary University of London, UCL, King's College London, London School of Hygiene and Tropical Medicine, Hull York Medical School, Durham University and Peninsula Medical School). The aim of the unit is to carry out research to inform policy to promote earlier diagnosis of cancer, symptomatically or by screening, and as a consequence bring down mortality from cancer.

In our strand of the Unit in Queen Mary University of London, our team concentrates on research aimed at evaluating cancer screening programmes, and devising innovations to these which will improve their effect on death from cancer, enhance their acceptability to the public and minimise side effects of screening, such as false positive rates.

Projects List:

• Breast and Bowel Cancer Screening
• Risk Estimates of Developing Breast Cancer into routine breast screening practice
• Policy Research Unit on cancer awareness, screening and early diagnosis
• Faecal immunochemical testing (FIT) for adenoma surveillance
• The validation of interim outcome measures for the evaluationof interventions promoting increased cancer awareness and early detection
• Strategies to reduce social gradient in Bowel Cancer Screening
• Natural history estimation for screening evaluation and planning
• A Comparison of TOMosynthesis with digital mammography in the UK NHS breast screening programme
• Promoting breast awareness and early presentation among Black women 25-50
• UKLS Lung Screening Trial
• Overdiagnosis in the Mammography Breast

Publications

• Swedish Two-County Trial: Impact of Mammographic Screening on Breast Cancer Mortality during 3 Decades
• Correcting for Lead Time and Length Bias in Estimating the Effect of Screen Detection on Cancer Survival
• Single Reading with Computer-Aided Detection for Screening Mammography
• Mammographic surveillance in women younger than 50 years who have a family history of breast cancer: tumour characteristics and projected effect on mortality in the prospective, single-arm, FH01 study
• Prospects for population screening and diagnosis of lung cancer
• Overdiagnosis in breast cancer screening: the importance of length of observation period and lead time
• Reduction in rate of node metastases with breast screening: consistency of association with tumor size
• Clinical and epidemiological issues in mammographic density

View all publications

Expertise

Cancer screening evaluation
Biostatistics
Cancer epidemiology
Disease modelling