目的 对自主设计的中老年人群简化版食物频率问卷（simplified food frequency questionnaire,SFFQ）进行信度及效度的评价,以便为当地中老年居民膳食调查提供简便、可靠的工具。方法 于2022年10月至2023年1月从成都市部分社区随机招募145名研究对象,在研究伊始进行第一次SFFQ及3 d 24 h膳食回顾调查,时隔4周后进行第二次SFFQ及3d 24h膳食回顾调查。采用Spearman相关性分析,通过比较前后两次SFFQ调查所得能量/营养素/食物的相关性来评估问卷信度,通过比较两次SFFQ均值与两次3 d 24 h膳食回顾法均值的相关性来评估问卷内容效度。结果 两次SFFQ的能量及营养素的Spearman相关系数（r）为0.380~0.637,组内相关系数（intraclass correlation coefficient,ICC）为0.253~0.558,食物的r为0.318~0.703,ICC为0.140~0.674;SFFQ和3 d 24 h膳食回顾法能量及营养素的r为0.412~0.771,食物的r为0.186~0.883,Bland-Altman分析显示各组散点均大致分布于95%一致性界限内。结论 本研究设计的SFFQ信效度尚可,可用于当地中老年人能量及营养素的摄入评估。
Abstract
Objective The reliability and validity of a self-designed Simplified Food Frequency Questionnaire (SFFQ) for middle-aged and elderly population were evaluated, in order to provide a simple and reliable tool for dietary surveys in local residents. Methods A total of 145 subjects were randomly recruited from selected communities in Chengdu from October 2022 to January 2023. The first SFFQ and 3-days 24-h dietary recall were conducted at the beginning, and the second SFFQ and 3-days 24-h dietary recall were conducted 4 weeks later. Spearman correlation analysis was used to evaluate the reliability of the questionnaire by comparing the energy / nutrients / foods correlations between the two SFFQs, and the validity of the questionnaire was evaluated by comparing the correlation between the mean of two SFFQs and the mean of two 3-days 24-h dietary recalls. Results For the two SFFQs, the Spearman correlation coefficient (r) of energy and nutrients was from 0.380 to 0.637, and the intraclass correlation coefficient (ICC) was from 0.253 to 0.558. The r of the foods was from 0.318 to 0.703, and the ICC was from 0.140 to 0.674. The r between energy and nutrients intakes by SFFQ and 3-days 24-h dietary recall ranged from 0.412 to 0.771 and from 0.186 to 0.883 for foods. It was shown in the Bland-Altman analysis that scatter points were almost distributed within the 95% limits of the agreement. Conclusion The reliability and validity of the SFFQ designed in this study are reasonable, and application in evaluating energy and nutrients intakes in middle-aged and elderly people are expected.
关键词
食物频率问卷 /
3d 24h膳食回顾 /
信度 /
效度
Key words
food frequency questionnaire /
3-days 24-h dietary recall /
reliability /
validity
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基金
四川省科技厅重点研发项目（No.2022YFS0569）；四川大学华西医院学科卓越发展1·3·5 工程临床研究基金（No.2021HXFH006）
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