Metformin Does Not Affect Cancer Risk: A Cohort Study in the U.K. Clinical Practice Research Datalink Analyzed Like an Intention-to-Treat Trial

Epidemiology/Health Services Research

¹Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece
²Cancer Epidemiology Unit, University of Oxford, Oxford, U.K.
³Clinical Trial Service Unit, University of Oxford, Oxford, U.K.
⁴Lipid Disorders Clinic, Department of Internal Medicine, University Hospital of Ioannina, Ioannina, Greece
⁵Division of Epidemiology, University of Texas School of Public Health, Houston, TX
⁶Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, St Mary's Campus, London, U.K.
⁷Human Genetics Foundation (HuGeF), Turin, Italy
⁸University College London Institute of Child Health, Centre for Paediatric Epidemiology and Biostatistics, London, U.K.
⁹Imperial Clinical Trials Unit, School of Public Health, Imperial College London, St Mary's Hospital, London, U.K.
¹⁰Stanford Prevention Research Center, Department of Medicine; Department of Health Research and Policy, Stanford University School of Medicine; and Department of Statistics, Stanford University School of Humanities and Sciences, Stanford, CA