Development and validation of a questionnaire to measure association factors with suicide: An instrument for a populational survey

Background and Aims Our goal was to develop an online questionnaire to survey the prevalence of suicidal behavior. Methods We developed a questionnaire with 51 variables and proceeded with validations. Validations were performed using face validity, content validity, and construct validity. Reliability was performed by test−rest. Results The face validity was 1.0 and the content validity was 0.91. The exploratory factor analysis got Kaiser−Meyer−Olkin = 0.86 and extracted one principal factor. The confirmatory factor analysis demonstrates root mean square error of approximation = 0.000 and comparative fit index = 1.000. The test−retest had an intraclass correlated coefficient of 0.98. Conclusion The adequate development questionnaire was validated, and we have an instrument to survey suicide behaviors during the pandemic time. Patient or Public Contribution The general population of Marília voluntarily responded to the questionnaire, as well as patients from the principal investigator's office.