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The Patient-Doctor Relationship Questionnaire (PDRQ-9) in Primary Care: A Validity Study.

John H Porcerelli1, William Murdoch, Pierre Morris

  • 1Department of Family Medicine & Public Health Sciences, Wayne State University School of Medicine, Detroit, MI, USA, jporcer@med.wayne.edu.

Journal of Clinical Psychology in Medical Settings
|August 10, 2014
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Summary

The Patient-Doctor Relationship Questionnaire-9 (PDRQ-9) is a valid and reliable tool for assessing the doctor-patient relationship in primary care. It effectively measures relationship quality and differentiates between patient groups.

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Area of Science:

  • Primary Care Research
  • Psychometrics
  • Health Psychology

Background:

  • The doctor-patient relationship is crucial for effective healthcare delivery.
  • Validated instruments are needed to assess this relationship in primary care settings.

Purpose of the Study:

  • To evaluate the validity and reliability of the Patient-Doctor Relationship Questionnaire-9 (PDRQ-9).
  • To assess the PDRQ-9's utility in a primary care population.

Main Methods:

  • The study involved 180 primary care patients.
  • Convergent and discriminant validity were assessed using correlations with other measures (DDPRQ-10, patient age, health, distress).
  • Factor analysis, internal consistency, and group comparisons (faculty vs. resident physicians) were performed.

Main Results:

  • The PDRQ-9 demonstrated good internal consistency (α = .96) and a single-factor structure.
  • It showed significant negative correlation with the DDPRQ-10, supporting convergent validity.
  • No significant correlations were found with patient age, health, or psychological distress.
  • Patients treated by faculty physicians reported higher PDRQ-9 scores than those treated by residents.

Conclusions:

  • The PDRQ-9 is a reliable and valid measure for the doctor-patient relationship in primary care.
  • Findings support its use in assessing relationship quality and identifying potential differences in care.