Huge variation in obtaining ethical permission for a non-interventional observational study in Europe Journal Articles uri icon

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  • BACKGROUND: Ethical approval (EA) must be obtained before medical research can start. We describe the differences in EA for an pseudonymous, non-interventional, observational European study. METHODS: Sixteen European national coordinators (NCs) of the international study on very old intensive care patients answered an online questionnaire concerning their experience getting EA. RESULTS: N = 8/16 of the NCs could apply at one single national ethical committee (EC), while the others had to apply to various regional ECs and/or individual hospital institutional research boards (IRBs). The time between applying for EA and the first decision varied between 7 days and 300 days. In 9/16 informed consent from the patient was not deemed necessary; in 7/16 informed consent was required from the patient or relatives. The upload of coded data to a central database required additional information in 14/16. In 4/16 the NCs had to ask separate approval to keep a subject identification code list to de-pseudonymize the patients if questions would occur. Only 2/16 of the NCs agreed that informed consent was necessary for this observational study. Overall, 6/16 of the NCs were satisfied with the entire process and 8/16 were (very) unsatisfied. 11/16 would welcome a European central EC that would judge observational studies for all European countries. DISCUSSION: Variations in the process and prolonged time needed to get EA for observational studies hampers inclusion of patients in some European countries. This might have a negative influence on the external validity. Further harmonization of ethical approval process across Europe is welcomed for low-risk observational studies. CONCLUSION: Getting ethical approval for low-risk, non-interventional, observational studies varies enormously across European countries.


  • de Lange, Dylan W
  • Guidet, Bertrand
  • Andersen, Finn H
  • Artigas, Antonio
  • Bertolini, Guidio
  • Moreno, Rui
  • Christensen, Steffen
  • Cecconi, Maurizio
  • Agvald-Ohman, Christina
  • Gradisek, Primoz
  • Jung, Christian
  • Marsh, Brian J
  • Oeyen, Sandra
  • Bollen Pinto, Bernardo
  • Szczeklik, Wojciech
  • Watson, Ximena
  • Zafeiridis, Tilemachos
  • Flaatten, Hans

publication date

  • December 2019