Validity of the Turkish patient-doctor relationship questionnaire (PDRQ-Turkish) in comparison with the Europep instrument in a family medicine center

Abstract

AIM: To establish the validity and concurrent reliability of the Turkish version of the PDRQ with an already validated questionnaire in Turkish, the EUROPEP-Turkish. Materials & methods: The study was performed in a family medicine outpatient clinic from October 2009 until April 2010. The PDRQ-Turkish was administered to 405 outpatient volunteers, simultaneously with the EUROPEP-Turkish. The statistics were performed in SPSS 17 and Lisrel 8.3. Student's t- test and confirmatory factor analysis were applied. Results: The mean age of the patients was 21.6 +/- 4.9 years (SD). The total scores for the PDRQ-Turkish and the EUROPEP-Turkish showed a moderate correlation (r=0.471, p=0.000) for all patients. Factor analysis of the PDRQ yielded two factors. However, the variance of the second factor accounted for 9.26% of the total variance, and the internal consistency Cronbach-alpha value of the second factor was 0.37. Thus, we deleted the items that loaded on the second factor (the 6th, 13th, 14th and the 15th items), and this change yielded an internal consistency Cronbach-alpha value of 0.91 and a large goodness of fit index (GFI) of 0.97 with the correlated factors model for the PDRQ-Turkish. The Cronbach-alpha of Europep instrument was found 0.91 also and there is no significant difference both them (p>0.05) Conclusion: The PDRQ-Turkish can be used as efficently as the Europep instrument for the patient and doctor relationship in primary care.