Gastroenterology – clinical epidemiology and clinical trials – Research group Ola Olén

The goal of our research is to improve healthcare and ultimately the quality of life for patients suffering from gastrointestinal diseases such as inflammatory bowel disease (IBD) or functional gastrointestinal disorders (e.g., irritable bowel syndrome).

Gastroenterology – clinical epidemiology and clinical trials

The members of research group Olén are a combination of part-time clinical researchers (paediatricians, gastroenterologists, surgeons, nurses) and full-time research specialists (biostatisticians and epidemiologists). Important research questions that we explore are: Why do some people develop IBD or IBS? What is the prognosis for those conditions (with a special focus on patients diagnosed during childhood)? Are new pharmacological and surgical treatments for IBD safe, effective, and worth the cost? Is it possible to treat IBS with psychosocial treatments?


Research funding bodies that support the research in your group, for example:

  • VR (The Swedish Research Council)
  • FORTE (Swedish Research Council for Health, Working life and Welfare)
  • SSMF (Svenska Sällskapet för Medicinsk Forskning)
  • Karolinska Institutet
  • Läkaresällskapets fonder (The Swedish Society of Medicine)
  • ALF (Regional agreement on medical training and clinical research between Stockholm County Council and Karolinska Institutet)
  • Ihre fellowship
  • The Swedish Cancer Society

Staff and contact

Group leader

All members of the group


We have ongoing collaboration with researchers at many departments at KI, all medical universities in Sweden as well as several international institutions. e.g.,

  • New York University
  • Harvard
  • Århus University
  • Copenhagen University 
  • Cambridge University
  •  Toronto
  •  Alberta
Gastroenterology and Hepatology Pediatrics Public Health, Global Health, Social Medicine and Epidemiology
Content reviewer: