Parc Sanitari Sant Joan de Déu, Sant Boi del Llobregat, Primary Care Prevention and Health Promotion Research Network, Madrid, and Open University of Catalonia, Barcelona, Spain.
Arthritis Care Res (Hoboken). 2013 Oct;65(10):1682-9. doi: 10.1002/acr.22034.
The present study attempted to fill a research gap by performing the first dimensionality analysis of the Revised Fibromyalgia Impact Questionnaire (FIQR) using exploratory and confirmatory techniques. A second objective was to report on the reliability and construct validity of the FIQR in Spanish patients.
FIQR data from a sample of adult fibromyalgia patients (n = 113) were analyzed using principal components analysis (PCA). Subsequently, a set of confirmatory factor analyses (CFAs) was conducted in another sample (n = 179) to analyze the goodness of fit of various factor models. FIQR reliability was assessed by computing Cronbach's alpha and coefficient H. Construct validity was evaluated by comparing the FIQR scores of participants categorized by employment status.
According to the PCA, the FIQR structure might be described as having 1 global factor of functional impairment. Although subsequent CFAs confirmed that 1 factor accounted for the greatest proportion of common variance in the FIQR items, a confirmatory bifactor analysis indicated that the items were multidimensional because of their simultaneous significant loading on specific factors. The Cronbach's alpha values of the FIQR domains were very good (>0.80) and the H estimate for the FIQR total score was excellent (0.93). Overall, the FIQR domains were able to distinguish between patients differing in employment status (working outside the home versus on sick leave).
Our results indicate that the Spanish version of the FIQR has a complex factor structure, has excellent reliability, and shows good construct validity.
本研究试图通过使用探索性和验证性技术对修订后的纤维肌痛影响问卷（FIQR）进行首次维度分析，以填补研究空白。第二个目的是报告 FIQR 在西班牙患者中的可靠性和结构有效性。
使用主成分分析（PCA）对来自成人纤维肌痛患者样本（n=113）的 FIQR 数据进行分析。随后，在另一个样本（n=179）中进行了一系列验证性因子分析（CFAs），以分析各种因子模型的拟合优度。FIQR 的可靠性通过计算 Cronbach 的 alpha 和 H 系数来评估。通过比较按就业状况分类的参与者的 FIQR 得分来评估结构有效性。
根据 PCA，FIQR 结构可以描述为具有 1 个功能障碍的整体因子。尽管随后的 CFAs 证实了 1 个因子可以解释 FIQR 项目中最大比例的共同方差，但验证性双因素分析表明，由于项目同时对特定因子有显著的负荷，因此项目是多维的。FIQR 各领域的 Cronbach's alpha 值非常好（>0.80），FIQR 总分的 H 估计值非常优秀（0.93）。总体而言，FIQR 各领域能够区分就业状况不同的患者（在家工作与休病假）。
我们的结果表明，FIQR 的西班牙语版本具有复杂的因子结构，具有良好的可靠性，并且表现出良好的结构有效性。
