Norwegian Knowledge Centre for the Health Services, Oslo, Norway.
BMC Health Serv Res. 2010 Sep 28;10:282. doi: 10.1186/1472-6963-10-282.
The Psychiatric Out-Patient Experiences Questionnaire (POPEQ) is an 11-item core measure of psychiatric out-patients experiences of the perceived outcome of the treatment, the quality of interaction with the clinician, and the quality of information provision. The POPEQ was found to have evidence for reliability and validity following the application of classical test theory but has not previously been assessed by Rasch analysis.
Two national postal surveys of psychiatric outpatients took place in Norway in 2004 and 2007. The performance of the POPEQ, including item functioning and differential item functioning, was assessed by Rasch analysis. Principal component analysis of item residuals was used to assess the presence of subdimensions.
6,677 (43.3%) and 11,085 (35.2%) psychiatric out patients responded to the questionnaire in 2004 and 2007, respectively. All items in the scale were retained after the Rasch analysis. The resulting scale had reasonably good fit to the Rasch model. The items performed the same for the two survey years and there was no differential item functioning relating to patient characteristics. Principal component analysis of the residuals confirmed that the measure to a high degree is unidimensional. However, the data also reflects three potential subscales, each relating to one of the three included aspects of health care.
The POPEQ had excellent psychometric properties and Rasch analysis further supported the construct validity of the scale by also identifying the three subdimensions originally included as components in the instrument development. The 11-item instrument is recommended in future research on psychiatric out-patient experiences. Future development may lead to the construction of more precise measures of the three subdomains that the POPEQ is based on.
精神科门诊患者体验问卷（POPEQ）是一种 11 项核心测量工具，用于评估精神科门诊患者对治疗结果的感知、与临床医生互动的质量和信息提供的质量。该问卷在应用经典测试理论后被发现具有可靠性和有效性，但之前尚未通过 Rasch 分析进行评估。
2004 年和 2007 年，挪威进行了两次全国性的精神科门诊患者邮寄调查。通过 Rasch 分析评估 POPEQ 的性能，包括项目功能和差异项目功能。使用项目残差的主成分分析来评估是否存在亚维度。
分别有 6677（43.3%）和 11085（35.2%）名精神科门诊患者对 2004 年和 2007 年的问卷做出了回应。Rasch 分析后保留了量表中的所有项目。由此产生的量表与 Rasch 模型拟合良好。该量表的项目在两个调查年份表现相同，且与患者特征无关的差异项目功能。残差的主成分分析证实，该测量具有高度的单一维度性。然而，数据也反映了三个潜在的亚量表，每个亚量表都与医疗保健的三个方面之一有关。
POPEQ 具有良好的心理计量学特性，Rasch 分析进一步支持了该量表的结构有效性，同时还确定了作为仪器开发组成部分的三个亚维度。建议在未来的精神科门诊患者体验研究中使用 11 项量表。未来的发展可能会导致构建更精确的基于 POPEQ 的三个亚领域的测量工具。
