European Prospective Investigation into Cancer and Nutrition

European Prospective Investigation into Cancer and Nutrition
Name	European Prospective Investigation into Cancer and Nutrition
Abbreviation	EPIC
Established	1992
Type	Prospective cohort study
Location	Europe
Coordinated by	International Agency for Research on Cancer
Participants	~521,000
Topics	Nutrition, Cancer, Chronic Disease

European Prospective Investigation into Cancer and Nutrition The European Prospective Investigation into Cancer and Nutrition is a large multicentre cohort study initiated to examine relationships between diet, nutritional status, lifestyle, and cancer risk across Europe. Launched in the early 1990s, the study links detailed dietary assessment, biospecimens, and follow-up for cancer outcomes to investigate etiological hypotheses relevant to public health and clinical practice. EPIC involves multiple institutions, funding agencies, and investigative teams to generate evidence used by policymakers, professional societies, and academic researchers.

Overview

EPIC was established through collaboration among research centres in multiple European countries to address variation in cancer incidence observed between populations such as those in France, Italy, Spain, United Kingdom, Germany, Sweden, Norway, Denmark, Greece, Netherlands, Portugal, Czech Republic, Poland, Norway, and Austria. The International Agency for Research on Cancer coordinated initial planning, while national institutes and universities provided recruitment infrastructure; participating centres included centres associated with institutions like the Karolinska Institutet, Imperial College London, Institut Gustave Roussy, University of Oxford, Charité – Universitätsmedizin Berlin, and Université Paris-Sud. Funding and support were provided by agencies such as the European Commission, national research councils, and philanthropic organisations linked to public health research.

Study Design and Methods

The study uses a prospective cohort design with baseline data collection comprising structured dietary questionnaires, lifestyle questionnaires, anthropometry, and blood sample collection; methods were harmonised across centres through protocol development involving experts from World Health Organization partner institutions and academic groups including teams from Harvard T.H. Chan School of Public Health and University of Cambridge. Dietary assessment combined food-frequency questionnaires and 24-hour dietary recalls calibrated against biomarkers measured at biobanks, and outcome ascertainment relied on cancer registries, hospital records, and mortality databases managed in cooperation with organisations like Eurostat and national cancer registries such as those run by Istituto Superiore di Sanità and Robert Koch Institute. Statistical analyses have employed multivariable models, calibration methods, and pooled meta-analytic techniques developed by groups affiliated with National Institutes of Health collaborators and European statistical centres.

Participant Recruitment and Cohorts

Recruitment achieved enrollment of over half a million participants aged mostly 35–70 at baseline from population-based and occupational cohorts; major recruitment campaigns were organised in regions represented by institutions including Milan, Barcelona, Lyon, Amsterdam, Bologna, Heidelberg, Uppsala, and Cambridge. Subcohorts include special groups such as the cohort of blood donors recruited in cooperation with regional transfusion services and occupational cohorts linked to employers and unions, with follow-up coordinated through partnerships with municipal health authorities and university hospitals such as Helsinki University Hospital and Addenbrooke's Hospital. Participant consent, ethics approvals, and data governance were overseen by institutional review boards at member universities and research centres.

Key Findings and Publications

EPIC has produced influential findings on dietary patterns and cancer risk, linking consumption patterns involving fruits, vegetables, red and processed meat, fibre, alcohol, and dietary fatty acids to risks of colorectal, breast, prostate, lung, and gastric cancers; prominent publications appeared in journals associated with editorial offices in The Lancet, BMJ, Journal of the National Cancer Institute, International Journal of Epidemiology, and Cancer Epidemiology, Biomarkers & Prevention. Collaborative working groups produced pooled analyses on body mass index and cancer outcomes, nutrient biomarkers and disease associations, and research on physical activity using instruments harmonised with those from the European Prospective Investigation into Cancer and Nutrition Physical Activity Study (EPIC-PA) network, with contributions from investigators at University of Turin, Lund University, and Ghent University.

Data Management and Biobank

A centralised data management framework and distributed biobank store aliquots of frozen plasma, serum, red blood cells, urine, and DNA linked to phenotypic and outcome data; biobanking operations have been undertaken at regional repositories associated with Institut Pasteur, German Cancer Research Center (DKFZ), IARC, and national bioresource facilities. Data harmonisation, secure transfer, and access governance were implemented via informatics platforms developed by teams at University College London and ETH Zurich, with metadata standards aligned with initiatives supported by the European Union research programmes and the European Molecular Biology Laboratory.

Collaborations and Governance

EPIC governance involves steering committees, scientific advisory boards, and working groups with representatives from participating universities, cancer institutes, and funding bodies such as the European Research Council and national ministries of health; collaborative networks include partnerships with consortia like the Cohorts for Heart and Aging Research in Genomic Epidemiology and disease-specific consortia on colorectal and breast cancer. Intellectual property, data sharing, and authorship policies are codified in consortium agreements negotiated among institutions including Sorbonne University, University of Copenhagen, Trinity College Dublin, and Universität Zürich.

Impact and Criticisms

The study has shaped dietary guidelines, oncology prevention strategies, and research priorities cited by organisations such as World Cancer Research Fund and European Society for Medical Oncology, informing risk estimates used by public health agencies across Europe. Criticisms include concerns about measurement error in self-reported diet, residual confounding highlighted by methodological reviewers at Johns Hopkins University and debates over generalisability to non-European populations raised by commentators linked to Columbia University and McGill University. Ongoing methodological work aims to address these limitations through biomarker calibration, genetic analyses in collaboration with consortia like GIANT and CARDIoGRAMplusC4D, and expanded follow-up to assess long-term outcomes.

Category:Cohort studies Category:Oncology research