Effect of Colonoscopy Screening on Risks of Colorectal Cancer and Related Death

Michael Bretthauer¹, Magnus Løberg¹, Paulina Wieszczy¹+19

• ¹From the Clinical Effectiveness Research Group (M. Bretthauer, M.L., P.W., M.K., K.G., M. Bugajski, Ø.H., H.-O.A., M.F.K.) and the Department of General Practice, Institute of Health and Society (L.E.), University of Oslo, the Clinical Effectiveness Research Group, Department of Transplantation Medicine, Oslo University Hospital (M. Bretthauer, M.L., M.K., K.G., Ø.H., H.-O.A.), and the Cancer Registry of Norway (G.H.), Oslo, the Institute of Clinical Medicine, University of Tromsø, Tromsø (M. Bretthauer), and the Department of Research and Development, Telemark Hospital, Skien (G.H.) - all in Norway; the Department of Gastroenterological Oncology, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology (P.W., M.R., M. Bugajski, N.D.P., A.M., J.R., M.F.K.), and the Departments of Pathology (A.M.) and Gastroenterological Oncology (P.W., M.R., M. Bugajski, N.D.P., A.M., J.R., M.F.K.), Medical Center of Postgraduate Education - both in Warsaw, Poland; Vårdcentralen Värmlands Nysäter and the Center for Clinical Research, County Council of Värmland, Karlsdad (L.E.), and the Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna (L.E., H.-O.A.) - both in Sweden; the Department of Gastroenterology and Hepatology, Amsterdam University Medical Centers, and the University of Amsterdam, Amsterdam (E.D.), and the Department of Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam (M.S., E.J.K.) - all in the Netherlands; the Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York (A.G.Z.); and CAUSALab, Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston (J.S., M.A.H.).