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About me

I’m an associate professor at the Department of Medical Epidemiology and Biostatistics (MEB), at Karolinska Institutet and currently a visiting scholar at Stanford school of Medicine (2015-6).

The common theme of my research is sustainable lifestyle and includes studies on short- and long-term effects of lifestyle factors on health in large population-based studies. My background is in nutritional epidemiology with focus on dietary factors, physical activity and weight management and risk of cancer. Recently, I started combining traditional nutritional epidemiology with research on climate change to be able to study diet-related greenhouse gas emission and the influence of climate-friendly food habits on public health. Another of my interests is e-epi and I introduced web-questionnaires at MEB in 2001 and have since then developed and validated a large number of interactive-web questionnaires.

Moreover, I’m responsible for teaching an introduction course in epidemiology for PhD students at KI and I have been a visiting teacher at Williams College, US. I have been the Director of Postgraduate studies at MEB, and the coordinator of the epi program for PhD students at KI. In addition, I have served as teacher for the VetU classes and coordinator for the degree projects at the medical program at KI.

Selected events

  • Appointed professor in public health at Mälardalens University College starting September 1, 2016.
  • We recently published results from the first validation study on diet-related greenhouse gas emissions in Environmental Health:
    Diet-related greenhouse gas emissions assessed by a food frequency questionnaire and validated using 7-day weighed food records. C Sjörs, SE Raposo, A Sjölander, O Bälter, F Hedenus, K Bälter. Environmental Health, 2016:15 (1).


  • Bachelor of Science, major in nutrition, University of Stockholm, 1993.
  • Ph.D. at Department of Oncology-Pathology, Karolinska Institutet, 1998.
  • Post doc fellow at Harvard School of Public Health and Boston University, 1998-9.

Research description

My current research projects are based on epidemiological method in order to study a sustainable lifestyle:


My research is supported by grants from the Swedish Research Council, Formas, The Swedish Cancer Foundation, The Swedish Research Council for Health, Working life and welfare (Forte), and Riksbankens Jubileumsfond.

Supervision of masters and PhD students

I have been the main supervisor for 20 students doing their bachelor or master thesis, summer school project, or research preparatory course, including students from the Erasmus and Fulbright programs, as well as the main supervisor for 5 students that have finished their PhD. I’m currently supervising the following PhD students:

Past doctoral students (as main supervisor):

Other activities

  • Expert and spokesperson on nutrition for the Swedish Cancer Foundation (2013-4).
  • Member of the expert panel on Diet and obesity at SBU – the Swedish Council on Health Technology Assessment – report published in 2013.
  • Member of the steering group for The Network for Epidemiology and Nutrition (NEON) in Sweden (2000-14).
  • Member of the board in the Association of Members of the Swedish Parliament and Researchers, RIFO (2001-04).
  • President of the Swedish association for nutritionists (2001-2).


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