Saskia Briede

Chapter 4 90 Supplementary appendix. COREQ checklist No Item Response Domain 1: Research team and reflexivity Personal Characteristics 1. Interviewer/ facilitator The interviews were conducted by AB and NB after training and under supervision of SB. 2. Credentials SB: medical doctor; NB: medical student; TvC: PhD, assistant professor language and communication; KK: medical doctor, professor of Acute Internal Medicine; AB: medical student. 3. Occupation SB is a resident in internal medicine at the University Medical Centre Utrecht and PhD student at Utrecht University. TvC is assistant professor language and communication at the department of Languages, Literature and Communication at Utrecht University. KK is professor of Acute Internal Medicine at Utrecht University. NB and AB were medical students at Utrecht University during the conduct of the study, currently NB is a medical doctor. 4. Gender All researchers were female. 5. Experience and training SB is a PhD student and therefore received formal education in research and medical ethics. KK is professor of acute internal medicine with research experience mainly in quantitative research. TC is assistant professor language and communication. Her research is mostly concerned with talk in interaction. She focuses mainly on talk in the health domain. SB and KK are both BROK certified (Basic course on Regulations and Organisation for clinical investigators). Before this project, SB was trained in qualitative research and especially interview studies by dr. A Oerlemans, assistant professor IQ Healthcare at Radboud university medical centre. NB and AB followed a Good Clinical Practice course and works under supervision of SB. Relationship with participants 6. Relationship established The interviewers did not have a prior relationship with the participants. The interviewers were not involved in the recruitment of patients in the previous study or the distribution of the patient education. 7. Participant knowledge of the interviewer Participants were aware the interviewers and other researchers were conducting a research project with the aim to understand more about the participants perspective on treatment wishes and limitations and the assessment of the patient education. 8. Interviewer characteristics The participants were aware the interviewers were medical students during a research internship and the aim of the research team was to publish this research data. Domain 2: study design Theoretical framework 9. Methodological orientation and Theory Collected data was analysed using reflexive thematic analysis with an inductive approach. Throughout the process, we operated within a qualitative paradigm, corresponding to the “Big Q thematic analysis” described by Terry et al. [17]

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