Data_Sheet_1_Development and validation of a tool to assess knowledge, attitudes, and practices toward diet sustainability.docx

This study aimed to develop and validate an instrument, the Sustainable Diets Questionnaire (SDQ), to assess the knowledge, attitude, and practice of sustainable diets in adult populations. A panel of four nutritionists identified 63 items through a literature review and refined them to a 54-item model for validation across four domains: Knowledge domain (K, eight items), Attitude domain (A, 18 items), Practice domain (P, 16 items) and Consumption Habits domain (D, 12 items). The validation process consisted of a pilot with 86 individuals (Phase 1) and a larger study with 389 participants (Phase 2). Confirmatory Factor Analysis (CFA) was conducted in both phases to verify model fit. In Phase 1, the initial four-factor model did not converge, indicating a need for item modification and a revised three-factor model (K domain, eight items; A domain, 18 items; new P domain, 28 items). In Phase 2, the new model showed improvement in fit indices with a Scaled Chi-Square of 2.415, Comparative Fit Index (CFI) of 0.863, Goodness of Fit Index (GFI) of 0.747, Tucker-Lewis Index (TLI) of 0.851 and the Root Mean Square Error (RMSE) was 0.066, although some indices fell below the 0.9 threshold. The Cronbach’s α for the Knowledge, Attitude, and Practice domains were 0.9, 0.96, and 0.897, respectively, with an overall α of 0.959. There was no significant difference between the first and second attempts of the SDQ model, indicating good test–retest reliability. There was also a significant positive correlation between the response scores of K, A, and P domains (K vs. A, r = 0.575, p

本研究旨在开发并验证一项工具——可持续饮食问卷（SDQ），以评估成年人群中关于可持续饮食的知识、态度和实践。四位营养专家通过文献综述确定了63个项目，并精炼为包含54个项目的模型，以在四个领域进行验证：知识领域（K，八个项目）、态度领域（A，十八个项目）、实践领域（P，十六个项目）以及消费习惯领域（D，十二个项目）。验证过程包括一项针对86名个体的小规模试点研究（第一阶段）和一项包含389名参与者的更大规模研究（第二阶段）。在两个阶段均进行了确认性因素分析（CFA）以验证模型拟合度。在第一阶段，初始的四因素模型未能收敛，表明需要修改项目并修订为包含三个因素的新模型（K领域，八个项目；A领域，十八个项目；新的P领域，二十八个项目）。在第二阶段，新模型在拟合指数上有所改善，其尺度卡方值为2.415，比较拟合指数（CFI）为0.863，拟合优度指数（GFI）为0.747，塔克-刘易斯指数（TLI）为0.851，均方根误差（RMSE）为0.066，尽管某些指数低于0.9的阈值。知识、态度和实践领域的Cronbach’s α系数分别为0.9、0.96和0.897，总体α系数为0.959。SDQ模型的第一次和第二次尝试之间没有显著差异，表明具有良好的重测信度。此外，K、A和P领域的响应分数之间也存在显著的正相关关系（K与A，r=0.575，p值...）