Epidemiology

The Research Unit for Epidemiology develops and delivers teaching and research in human epidemiology. Our research includes epidemiological themes such as diet, lifestyle, reproduction, vaccines, environment, genetics and medication. And we find common ground in the application of epidemiological methods to address health challenges.

We work with a wide set of national and international collaborators at leading research centres, and our vision is to develop into one of the global centres of research excellence in epidemiology by developing a portfolio of research projects that apply state-of-the-art epidemiological methods to resolve societally and academically important research questions.

The research unit’s research covers different epidemiological aims, such as:

  • descriptive epidemiology of trends in the occurrence of conditions and diseases, their risk factors and complications based on Danish and international register data,
  • aetiological observational epidemiology examining the contribution of a wide variety of physiological, behavioural, societal and genetic mechanisms to the risk of health outcomes, including diseases and their complications, using both Danish and international cohorts and
  • data collection, processing and/or analysis of several core Danish cohorts and trials.

Methods

Epidemiological methods focus on the quantitative analysis of occurrence of health outcomes and their determinants at the level of populations. Epidemiological methods include study designs (sampling, data collection and processing, quality control), and statistical analytical approaches combined with subject matter knowledge.

The aim is to chart the distribution of health conditions and to determine causes of population health. Although different groups of researchers within the unit focus on different exposures and different health outcomes, the strength of the research unit lies in a shared focus on applying rigorous epidemiologic principles and methodological approaches and in the group’s ability to define, develop and apply the most appropriate scientific strategy to explore a given research question.

Recent publications

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Warp, M. L., Grindstad, T., Skåra, K. H., Magnus, M. C., Håberg, S. E., Morken, N. H., Romundstad, L. B., Ramlau-Hansen, C. H. & Hanevik, H. I. (2025). Maternal time interval between menarche and childbirth is associated with daughter's age at menarche. Acta Obstetricia et Gynecologica Scandinavica, 104(6), 1101-1111. https://doi.org/10.1111/aogs.15088
Warp, M. L., Skåra, K. H., Grindstad, T. K., Kirkegaard, K., Morken, N.-H., Ramlau-Hansen, C. H., Romundstad, L. B., Håberg, S. E. & Hanevik, H. I. (2025). The functional ovarian anatomy of 492 women aged 18-22 years: a population-based study in Norway. Human Reproduction Open, 2025(4), Article hoaf057. https://doi.org/10.1093/hropen/hoaf057
Ward, H. A., Norat, T., Overvad, K., Dahm, C. C., Bueno-de-Mesquita, H. B., Jenab, M., Fedirko, V., van Duijnhoven, F. J. B., Skeie, G., Romaguera-Bosch, D., Tjønneland, A., Olsen, A., Carbonnel, F., Affret, A., Boutron-Ruault, M.-C., Katzke, V., Kühn, T., Aleksandrova, K., Boeing, H. ... Riboli, E. (2016). Pre-diagnostic meat and fibre intakes in relation to colorectal cancer survival in the European Prospective Investigation into Cancer and Nutrition. International Journal of Cancer, 116(2), 316-25. https://doi.org/10.1017/S0007114516001859
Ward, H. A., Gayle, A., Jakszyn, P., Merritt, M., Melin, B., Freisling, H., Weiderpass, E., Tjonneland, A., Olsen, A., Dahm, C. C., Overvad, K., Katzke, V., Kühn, T., Boeing, H., Trichopoulou, A., Lagiou, P., Kyrozis, A., Palli, D., Krogh, V. ... Cross, A. J. (2018). Meat and haem iron intake in relation to glioma in the European Prospective Investigation into Cancer and Nutrition study. European Journal of Cancer Prevention, 27(4), 379-383. https://doi.org/10.1097/CEJ.0000000000000331
Ward, H. A., Wark, P. A., Muller, D. C., Steffen, A., Johansson, M., Norat, T., Gunter, M. J., Overvad, K., Dahm, C. C., Halkjær, J., Tjønneland, A., Boutron-Ruault, M.-C., Fagherazzi, G., Mesrine, S., Brennan, P., Freisling, H., Li, K., Kaaks, R., Trichopoulou, A. ... Riboli, E. (2017). Measured adiposity in relation to head and neck cancer risk in the European Prospective Investigation into Cancer and Nutrition. Cancer Epidemiology, Biomarkers & Prevention, 26(6), 895-204. https://doi.org/10.1158/1055-9965.EPI-16-0886
Ward, H. A., Whitman, J., Muller, D. C., Johansson, M., Jakszyn, P., Weiderpass, E., Palli, D., Fanidi, A., Vermeulen, R., Tjønneland, A., Hansen, L., Dahm, C. C., Overvad, K., Severi, G., Boutron-Ruault, M.-C., Affret, A., Kaaks, R., Fortner, R., Boeing, H. ... Cross, A. J. (2019). Haem iron intake and risk of lung cancer in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. European Journal of Clinical Nutrition, 73(8), 1122-1132. https://doi.org/10.1038/s41430-018-0271-2
Ward, H. A., Murphy, N., Weiderpass, E., Leitzmann, M. F., Aglago, E., Gunter, M. J., Freisling, H., Jenab, M., Boutron-Ruault, M.-C., Severi, G., Carbonnel, F., Kühn, T., Kaaks, R., Boeing, H., Tjønneland, A., Olsen, A., Overvad, K., Merino, S., Zamora-Ros, R. ... Cross, A. J. (2019). Gallstones and incident colorectal cancer in a large pan-European cohort study. International Journal of Cancer, 145(6), 1510-1516. https://doi.org/10.1002/ijc.32090

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