School of Applied Psychology, University College Cork, Cork, Ireland.
Health Economics and Outcomes Research, Murdoch Children's Research Institute and Monash University, Melbourne, Victoria, Australia.
J Allergy Clin Immunol Pract. 2023 May;11(5):1522-1527.e5. doi: 10.1016/j.jaip.2023.02.018. Epub 2023 Mar 1.
The Food Allergy Quality of Life Questionnaire (FAQLQ) is the most widely used measure to assess health-related quality of life in food allergy. However, its length can lead to a series of disadvantages, such as reduced or incomplete participation and boredom and disengagement, affecting data quality, reliability, and validity.
We shortened the well-known FAQLQ for adults and propose the FAQLQ-12.
We applied reference-standard statistical analyses, mixing classic test theory and item response theory to identify relevant items for the new short form and confirm its structure fit and reliability. More specifically, we employed discrimination, difficulty, and information levels (item response theory), confirmatory factor analysis, Pearson's correlations, and reliability analysis (McDonald ω and Cronbach α).
We chose items with the highest discrimination values to compose the shortened FAQLQ because they were among the ones with the best difficulty levels and the highest amount of individual information. We retained three items per factor because this number allowed for acceptable reliability levels, resulting in 12 items. The FAQLQ-12 presented a better model fit compared with the complete version. The correlation patterns and reliability levels were similar for both the 29 and 12 versions.
Although the full version of the FAQLQ remains a reference standard to assess food allergy quality of life, the FAQLQ-12 is introduced as a powerful and beneficial alternative. It can help participants, researchers, and clinicians in specific settings, such as dealing with time and budget limitations, and provides high-quality and reliable responses.
食物过敏生活质量问卷（FAQLQ）是评估食物过敏相关生活质量最常用的测量工具。然而，其长度可能会导致一系列缺点，例如参与度降低或不完整、以及厌倦和脱离，从而影响数据的质量、可靠性和有效性。
我们缩短了广为人知的成人 FAQLQ，并提出了 FAQLQ-12。
我们应用了参考标准统计分析，结合经典测试理论和项目反应理论，以确定新的简短形式的相关项目，并确认其结构适配性和可靠性。更具体地说，我们采用了区分度、难度和信息量（项目反应理论）、验证性因子分析、皮尔逊相关和可靠性分析（麦克唐纳 ω 和克朗巴赫 α）。
我们选择了具有最高区分度的项目来组成缩短的 FAQLQ，因为它们是具有最佳难度水平和最高个体信息量的项目之一。我们保留了每个因子的三个项目，因为这个数量可以达到可接受的可靠性水平，从而产生 12 个项目。FAQLQ-12 与完整版本相比呈现出更好的模型适配度。两种版本的相关模式和可靠性水平都相似。
尽管完整版本的 FAQLQ 仍然是评估食物过敏生活质量的参考标准，但引入了 FAQLQ-12 作为一种强大且有益的替代方法。它可以帮助参与者、研究人员和临床医生在特定环境中，例如处理时间和预算限制，提供高质量和可靠的反应。
