瘙痒认知问卷英文版的编制及心理测量学特征。
Development and psychometrics of the English version of the Itch Cognitions Questionnaire.
机构信息
Cancer Prevention and Control, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States of America.
Institute of Medical Psychology, Justus-Liebig-University Gießen, Gießen, Germany.
出版信息
PLoS One. 2020 Mar 19;15(3):e0230585. doi: 10.1371/journal.pone.0230585. eCollection 2020.
BACKGROUND
The aim of this study was to validate the English version of the Itch Cognition Questionnaire in a sample of patients with chronic itch due to psoriasis or atopic dermatitis. An English-language version of an instrument assessing itch-related cognitions is needed since cognitions can contribute to a worsening of itch, and chronic itch is prevalent in English-speaking counties and internationally.
METHODS
The German Itch Cognitions Questionnaire was translated into English, and cognitive interviewing was conducted to finalize item wording. Internal and test-retest reliability, item discrimination, responsiveness to change, and construct, convergent, and discriminant validity were assessed in a national sample of 137 individuals with chronic itch due to atopic dermatitis or psoriasis recruited online.
RESULTS
Internal reliability was high with Cronbach's alphas of 0.93 for the Catastrophizing subscale and 0.88-0.90 for Coping. The Pearson's correlation assessing 1-month test-retest reliability for the Catastrophizing subscale was r = 0.62 and for the Coping subscale was r = 0.61. The corrected item-total correlation revealed that items were relatively consistent with the scores for the subscales (with correlations ranging from 0.58 to 0.79), indicating very good item discrimination. Results of factor analysis, convergent and discriminant, and responsiveness to change analyses provided evidence for validity.
CONCLUSIONS
This study showed good psychometric characteristics of the English version of the Itch Cognitions Questionnaire. We suggest that future studies investigate the use of the measure in clinical practice to assist with treatment planning and outcome assessment related to itch as well as address study limitations such as sampling and replication.
背景
本研究旨在验证英文版瘙痒认知问卷（Itch Cognition Questionnaire）在患有银屑病或特应性皮炎慢性瘙痒患者中的适用性。由于认知可能会导致瘙痒恶化，且慢性瘙痒在英语国家和国际上都较为普遍，因此需要一种评估瘙痒相关认知的英文工具。
方法
将德文版瘙痒认知问卷翻译成英文，并进行认知访谈以最终确定项目措辞。我们在网上招募了 137 名患有特应性皮炎或银屑病慢性瘙痒的个体，对其进行全国性样本测试，以评估内部和重测信度、项目区分度、反应度以及结构、收敛和判别效度。
结果
采用 Cronbach's α 系数评估内部信度，其中灾难化亚量表的 Cronbach's α 为 0.93，应对亚量表的 Cronbach's α 为 0.88-0.90。评估灾难化亚量表 1 个月重测信度的 Pearson 相关系数为 r = 0.62，评估应对亚量表的 Pearson 相关系数为 r = 0.61。校正后的项目-总分相关表明，项目与亚量表得分相对一致（相关系数范围为 0.58-0.79），表明项目区分度较好。因子分析、收敛和判别以及反应度分析的结果提供了有效性的证据。
结论
本研究表明英文版瘙痒认知问卷具有良好的心理测量学特性。我们建议未来的研究调查该测量工具在临床实践中的应用，以协助瘙痒的治疗计划和结果评估，并解决研究中的局限性，如抽样和复制问题。
Zotero 插件