Content validity of the questionnaire considering opinions of the Finnish physicians on euthanasia and assisted suicide

Despite numerous surveys conducted across the world considering assisted death, content validity evaluations of the survey questionnaires are seldom published. Likewise, there is no previous research about the content validity of the survey "Finnish physicians´ attitudes and opinions on euthanasia and physician-assisted suicide" conducted by the Finnish Medical Association. The aim of this study was to assess the content validity of the survey questionnaire. To study this, a purposive sample of physicians was recruited. Firstly, the participants were interviewed to bring up their interpretations and assessments considering the relevance, comprehensibility, and measurement scale suitability of the questions. Secondly, the participants assessed the revised study questionnaire. Altogether 16 physicians participated in the study. Although the relevance and comprehensibility of the questions were assessed to be high-level, parallel interpretations of the contents were discovered. We suggest content validity research to be essential when developing a questionnaire on assisted death. Our results could be helpful when planning future surveys about this challenging topic.