BACKGROUND The patient-doctor relationship is an important concept in health care. The aim of this study was to evaluate the psychometric properties, convergent validity, and factorial invariance of the Patient-Doctor Relationship Questionnaire (PDRQ-9). METHOD Confirmatory factor analysis was conducted to explore the scale's dimensionality and test for strong measurement invariance across sex, age, and tumor site in a prospective, multicenter cohort of 560 patients who completed the PDRQ-9, Health-related Quality of Life Questionnaire (EORTC-QLQ-C30), and Brief Symptom Inventory (BSI) scales. RESULTS The data supported a unidimensional structure. Thresholds and factor loadings could be constrained to be invariant across sex, age, and tumor site, indicating strong measurement invariance. Scores derived from the unidimensional structure exhibited satisfactory degrees of reliability and determinacy. Evidence of convergent validity was supported by modest positive correlations with functional (p<.001) and global quality-of-life (p<.001) and negative correlations with psychological distress (p<.001). Low satisfaction with the oncologist was associated with anxiety (p=.006), and depression (p=.004). CONCLUSIONS The PDRQ-9 is a suitable, valid instrument for assessing the quality of patient-doctor relationships in cancer patients.

中文翻译：

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癌症患者 PDRQ-9 的心理测量特性：医患关系问卷。

背景技术医患关系是医疗保健中的一个重要概念。本研究的目的是评估医患关系问卷 (PDRQ-9) 的心理测量特性、收敛效度和因子不变性。方法 在一个由 560 名完成 PDRQ-9 健康相关生活质量问卷 (EORTC -QLQ-C30) 和简要症状量表 (BSI) 量表。结果 数据支持一维结构。阈值和因子载荷可以被限制为跨性别、年龄和肿瘤部位不变，这表明测量具有很强的不变性。来自一维结构的分数表现出令人满意的可靠性和确定性。收敛效度的证据得到了与功能 (p<.001) 和整体生活质量 (p<.001) 的适度正相关以及与心理困扰 (p<.001) 的负相关的支持。对肿瘤科医生的低满意度与焦虑 (p=.006) 和抑郁 (p=.004) 相关。结论 PDRQ-9 是评估癌症患者医患关系质量的合适、有效的工具。对肿瘤科医生的低满意度与焦虑 (p=.006) 和抑郁 (p=.004) 相关。结论 PDRQ-9 是评估癌症患者医患关系质量的合适、有效的工具。对肿瘤科医生的低满意度与焦虑 (p=.006) 和抑郁 (p=.004) 相关。结论 PDRQ-9 是评估癌症患者医患关系质量的合适、有效的工具。