Measurement properties of the osteoarthritis of knee and hip quality of life OAKHQOL questionnaire: an item response theory analysis
Measurement properties of the osteoarthritis of knee and hip quality of life OAKHQOL questionnaire: an item response theory analysis
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DOI：
10.1093/rheumatology/keq357
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发表时间：
2011-03-01
期刊：
影响因子：
5.5
通讯作者：
Guillemin, Francis
中科院分区：
文献类型：
--
作者：
Goetz, Christophe;Ecosse, Emmanuel;Guillemin, Francis
方法。已经开发了Oakhqol自我管理的问卷，以评估下肢OA中与健康相关的生活质量。膝盖或髋关节OA严重程度不同的患者回答了问卷。对于每个领域，他们对项目的响应均通过Rasch家庭模型（部分信用模型）进行分析。我们检查了数据对建模期望的拟合度以及一维性和本地独立性的假设。通过分析通过性别，年龄和关节来评估不变性（DIF）。分析使用了Rumm2020软件（Rumm Laboratory，珀斯，西澳大利亚州）。分析了544例患者的反应：297例医学管理的OA和247例正在等待关节置换手术。对于OAKHQOL的40个项目，数据分析显示5个具有无序阈值和9个dif（5个关节，性别为5，年龄为1）。十对项目显示局部依赖性，四个域显示一维性。没有错误的项目的全项目域和域在患者估计数据上没有差异。因此，在考虑域分数时，项目级别上的任何偏差都可以忽略不计。 Oakhqol问卷的五个域通过Rasch分析显示出良好的测量属性，并提供有效的量表。
Methods. The OAKHQOL self-administered questionnaire has been developed to assess health-related quality of life in lower limb OA. Patients with various degrees of severity of knee or hip OA answered the questionnaire. For each domain, their responses to the items were analysed with a Rasch family model, the partial credit model. We examined the fit of data to model expectations, as well as assumptions of unidimensionality and local independence. Invariance was assessed by analysis of differential item functioning (DIF) by sex, age and joint. Analyses used the RUMM2020 software (Rumm Laboratory, Perth, Western Australia).Results. Responses for 544 patients were analysed: 297 had medically managed OA and 247 were waiting for arthroplasty surgery. For the 40 items of the OAKHQOL, data analysis showed 5 with disordered thresholds and 9 with DIF (5 for joint, 3 for sex and 1 for age). Ten pairs of items showed local dependence and four domains showed unidimensionality. Full-item domains and domains without the misfitted items did not differ in patient-estimates data; therefore any bias at the item level is negligible when considering the domain scores.Conclusion. The five domains of the OAKHQOL questionnaire show good measurement properties by Rasch analysis and provide valid scales.