Patient-physician communication in the context of diabetes care: Adaptation and assessment of psychometric properties of a Persian version of the Interpersonal Process of Care Survey (P-IPC).

Abstract Aims To examine the psychometric characteristics and explore the preliminary validity of the Persian version of the Interpersonal Processes of Care Survey (P-IPC) to assess patient-physician communication in the context of diabetes care. Methods After adapting, translating, examining content validity, and pretesting the questionnaire, it was administered to 300 patients with diabetes. Confirmatory factor analysis identified the factor structure (scales). Variability, item-scale correlations, reliability, and construct validity of the final scales were examined. Results Factor analysis supported the hypothesized second-order factor model with 27 of the 29 items:11 first-, and 7 second-order common factors. Scale scores were calculated for the 7 second-order factors. Internal-consistency reliability for the 7 scales ranged from 0.60 to 0.90 and 2-week test-retest correlations ranged from 0.89 to 0.96. The communication and interpersonal style domains of the P-IPC demonstrated high ceiling effects suggesting good patient-physician communication. The P-IPC scales differentiated between patients in the language-concordant and language-discordant groups, and patterns of correlations with three patient satisfaction measures corresponded to hypotheses. Conclusion The P-IPC includes all of the second-order scales identified in the original IPC. Evidence of its reliability and validity suggest it can be useful for assessing patient-physician communication in the context of diabetes care.