The International Center for Health Innovation & Nutrition, School of Public Health, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Department of Nutritional Sciences, Tel-Hai College, Tel Hai, Israel.
PLoS One. 2024 Apr 16;19(4):e0299515. doi: 10.1371/journal.pone.0299515. eCollection 2024.
The adoption of plant-based diets in recent years has increased the need for accurate assessments of dietary intake among vegans, vegetarians, semi-vegetarians, and omnivores. This study aimed at developing and validating a modular web-based food-frequency questionnaire (FFQ), the MY-VEG-FFQ. This FFQ was based on the original FFQ (O-FFQ) designed for the Israeli population and incorporates a skip algorithm tailored for different dietary patterns.
A convenience sample of 101 participants, recruited via social media, completed the MY-VEG FFQ, as well as a three-day food records, which served as the gold standard for this research. Relative validity of the new FFQ was evaluated by comparing nutrients with those in the three-day food records, using Pearson correlation coefficients, Bland-Altman plots, and cross-classification. The results were compared with 90 O-FFQs that previously had been completed by vegans.
The validation analysis showed that nutrient-intake estimates were generally higher for the MY-VEG-FFQ than those of the three-day food records. Pearson correlation coefficients ranged between 0.25-0.63, indicating an acceptable agreement between the two tools. The proportion of participants with exact or adjacent quartile agreement was between 73%-82%. The Bland-Altman analysis revealed overestimation of nutrient intake via the MY-VEG-FFQ. Compared to the O-FFQ, vegans who completed the MY-VEG-FFQ reported consumption of more food items. Additionally, the MY-VEG-FFQ showed a significantly higher intake of most macro- and micronutrients.
The My-VEG-FFQ demonstrated reasonable validity in assessing dietary intake among people who followed a plant-based diet. However, it tended to overestimate nutrient intake compared to the three-day food records. The development of a modular web-based FFQ with a skip algorithm tailored for specific dietary patterns, fills a crucial gap in accurately assessing the dietary intake of these populations. The MY-VEG-FFQ offers a practical and cost-effective tool for evaluating long-term dietary consumption among people who follow different dietary patterns.
近年来，植物性饮食的普及使得人们对素食主义者、素食者、半素食者和杂食者的膳食摄入量的准确评估需求增加。本研究旨在开发和验证一种基于网络的模块化食物频率问卷（FFQ），即 MY-VEG-FFQ。该 FFQ 基于为以色列人群设计的原始 FFQ（O-FFQ），并结合了针对不同饮食模式的跳转算法。
通过社交媒体招募了 101 名方便参与者完成了 MY-VEG-FFQ 以及为期三天的食物记录，后者作为本研究的金标准。通过比较新 FFQ 与三天食物记录中的营养素，使用 Pearson 相关系数、Bland-Altman 图和交叉分类评估新 FFQ 的相对有效性。将结果与之前由素食者完成的 90 份 O-FFQ 进行比较。
验证分析表明，MY-VEG-FFQ 的营养素摄入量估计值通常高于三天食物记录。Pearson 相关系数在 0.25-0.63 之间，表明两种工具之间具有可接受的一致性。73%-82%的参与者具有完全或相邻四分位数的一致性。Bland-Altman 分析显示，通过 MY-VEG-FFQ 高估了营养素的摄入量。与 O-FFQ 相比，完成 MY-VEG-FFQ 的素食者报告食用了更多的食物。此外，MY-VEG-FFQ 显示出大多数宏量和微量营养素的摄入量显著增加。
MY-VEG-FFQ 在评估植物性饮食人群的膳食摄入量方面具有合理的有效性。然而，与三天食物记录相比，它往往会高估营养素的摄入量。开发一种具有针对特定饮食模式的跳转算法的模块化网络 FFQ，填补了准确评估这些人群膳食摄入量的重要空白。MY-VEG-FFQ 为评估不同饮食模式人群的长期膳食消耗提供了一种实用且经济有效的工具。
