Translation and validation of the Persian version of the caring nurse-patient interaction scale (CNPI-23)

Introduction and objectives Although there is great emphasis on nursing care interaction, there is a lack of knowledge about the quality of nurse-patient care interactions in Iran. The lack of knowledge is mainly related to a lack of short Persian instruments that measure nurse-patient interaction from a caring perspective. The present study aimed to validate a Persian version of the nurse and patient versions of the Caring Nurse-Patient Interaction scale (CNPI-23). Methods The scale (CNPI-23) was translated to Persian using the forward-backward translation method. After translation and re-translation, the scale was given to 15 nurses and faculty members of Kerman University of Medical Sciences, and CVI and CVR indices were calculated based on their opinions. The analytical cross-sectional study was conducted in Kerman/Iran in 2022. In this study, 230 working nurses and 230 hospitalized patients in hospitals affiliated with Kerman University of Medical Sciences were recruited using the convenience method to complete the 23-item Caring Nurse-Patient Interaction scale. Exploratory and confirmatory factor analyses were used to analyze the validity of the scale, and Cronbach's alpha and Raykov's rho indices were also calculated to evaluate internal consistency and composite reliability. Data were analyzed using R 4-1-2 software. Results The scale was completed by 230 nurses and 230 patients. It included four dimensions: humanitarian care, clinical care, comforting care, and communication care. The results of the content validity ratio (CVR) and content validity index (CVI) were acceptable for all items. The minimum value of reliability was 0.49. All the items were approved at the end of the content validity assessment. In the patients' scale, these four factors explained 81% of the total variance, and for the exploratory model, all the indices show the adequacy of the model. All factor loadings were significant and higher than 0.5. Raycov's rho and Cronbach's alpha indices for all numbers were higher than 0.7. The findings of the exploratory factor analysis showed that the nurses' scale reflected four caring domains, which explained about 62% of the total variance, and the results of Raycov's rho and Cronbach's alpha indices confirmed the final fit of this model. Conclusion In general, the Persian version of the Caring Nurse-Patient Interaction scale has good validity and reliability and can be used to evaluate the quality of care interaction between Persian-speaking nurses and patients.