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Article History

Received: 3 December 2020

Accepted: 5 April 2022

First Online: 25 April 2022

Declarations

:

: For this study the need for ethics approval was deemed unnecessary according to national regulations by the Dutch central committee on research involving human subjects (ccmo).For the original studies included in the International Mission on Prognosis And Clinical Trial Design in Traumatic Brain Injury database: the studies have been approved by the Ethical Committees of all participating centres (Additional file ) and have been performed in accordance with the ethical standards laid down in the Declaration of Helsinki and its later amendments.Informed consent was obtained according to local and national requirements: due to the nature of brain injury, patients were unable to provide study consent and, therefore, written informed consent was obtained from legally authorised representatives before the start of all study procedures.Centre for Medical Decision Making, Department of Public Health, Erasmus MC cooperated in the development and realization of the IMPACT study and therefore participating researchers had access to the data.

: Not applicable.

: The authors declare that they have no competing interests.