Non-medical factors in prehospital resuscitation decision-making: a mixed-methods systematic review.

"Declarations Ethics approval and consent to participateAccording to Danish law, ethics approvals are not required for systematics reviews. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This study is supported by grants from the Danish Air Ambulance Research Foundation, The Region of Southern Denmark, and the University of Southern Denmark. This did not influence the study design; the collection, analysis, and interpretation of data; the writing of the report; or the decision to submit the article for publication. All authors are independent of funders and all authors had full access to all the data (including analyses reports and tables) in the study. All authors take responsibility for the integrity of the data and the accuracy of the data analysis."

"We conducted a mixed-methods systematic review with a narrative synthesis and reported this according to the Cochrane Qualitative Research Methods Group guidelines [] and the PRISMA guidelines for reporting of systematic reviews []. As PRISMA is not designed for mixed-methods systematic reviews, we applied the fields relevant to our study (See Additional file ). A systematic mixed-method review allows for the inclusion of multiple methodologies to combine the strengths of quantitative and qualitative methods but also makes it possible to compensate for the limitations in each method []. Our protocol was published on PROSPERO on March 17, 2021 (PROSPERO registration number CRD42021237078)."