Wittkowski Anja, Richards Helen L, Williams Jennifer, Main Chris J
Clinical Psychology, University of Manchester, Manchester, UK.
Psychol Health Med. 2008 May;13(3):346-59. doi: 10.1080/13548500701487697.
The objective of this study was to examine the psychometric properties of the revised Illness Perceptions Questionnaire (IPQ-R) in adult participants with atopic dermatitis (AD). Two hundred and eighty-four participants who had a GP or dermatologist confirmed diagnosis of AD completed the IPQ-R. The factor structure of the IPQ-R was examined using confirmatory (CFA) and exploratory factor analysis (EFA). The results of the CFA did not indicate a good comparative fit with the IPQ-R subscales, while the EFA and a fixed six-factor principal components analysis largely replicated the original factor structure of the IPQ-R. The existence of the acute/chronic and cyclical timeline dimensions, and the illness coherence subscale was most strongly supported, while all items of the consequences and emotional representation subscales consistently loaded onto one factor. The EFA for causal attributions did not produce a stable solution. The findings indicate that although the factor structure of the IPQ-R was not confirmed in the sample of patients with AD using CFA, it was partly reproduced using EFA. Overall, the results suggest that in patients with AD the IPQ-R, in particular the consequences and emotional representations subscales, should be employed and interpreted with care.
本研究的目的是检验修订后的疾病认知问卷（IPQ-R）在成年特应性皮炎（AD）患者中的心理测量特性。284名经全科医生或皮肤科医生确诊为AD的参与者完成了IPQ-R问卷。使用验证性因素分析（CFA）和探索性因素分析（EFA）对IPQ-R的因素结构进行了检验。CFA的结果并未表明IPQ-R各分量表具有良好的比较拟合度，而EFA和固定的六因素主成分分析在很大程度上重现了IPQ-R的原始因素结构。急性/慢性和周期性时间维度以及疾病连贯性分量表的存在得到了最有力的支持，而后果和情感表征分量表的所有项目始终加载到一个因素上。因果归因的EFA未产生稳定的解决方案。研究结果表明，尽管在AD患者样本中使用CFA未证实IPQ-R的因素结构，但使用EFA部分重现了该结构。总体而言，结果表明，在AD患者中，应谨慎使用和解释IPQ-R，尤其是后果和情感表征分量表。
