The Patient-Doctor Relationship Questionnaire (PDRQ-9) in primary care: A validity study

  • Porcerelli J
  • Murdoch W
  • Morris P
 et al. 
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Abstract

This study assessed the validity of the Patient-Doctor Relationship Questionnaire-9 (PDRQ-9) in a primary care sample (N = 180). Convergent validity was assessed through a correlation between the patient-rated PDRQ-9 and the physician-rated Difficult Doctor Patient Relationship Questionnaire-10 (DDPRQ-10). Discriminant validity was assessed through correlations between the PDRQ-9 and patient age, patient- and physician-reported health and psychological distress. To determine if the PDRQ-9 could discriminate between groups, patient PDRQ-9 ratings were compared between patients who were treated by faculty physicians versus those who were treated by residents. An exploratory factor analysis confirmed that the PDRQ-9 was made up of a single factor. The PDRQ-9 scale was internally consistent (α = .96) and significantly and negatively correlated with the DDPRQ-10 (r = -.22, p = .003) and was not significantly correlated with patient age, health, or psychological distress. PDRQ-9 ratings were statistically greater in patients who were treated by faculty physicians than those who were treated by residents (p = .01). This study provides additional support for the reliability and validity of the PDRQ-9 as a measure of the doctor-patient relationship in a primary care sample.

Author-supplied keywords

  • Convergent validity
  • DDPRQ-10
  • Discriminant validity
  • Doctor-patient relationship
  • PDRQ-9
  • Patient-doctor relationship questionnaire

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Authors

  • John H. Porcerelli

  • William Murdoch

  • Pierre Morris

  • Shannon Fowler

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