评估新西兰青少年食物摄入的食物频率问卷的可靠性和相对有效性。
Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents.
机构信息
Department of Human Nutrition, University of Otago, Dunedin, 9054, New Zealand.
出版信息
Nutr J. 2012 Sep 5;11:65. doi: 10.1186/1475-2891-11-65.
BACKGROUND
Due to the absence of a current and validated food frequency questionnaire (FFQ) for use in New Zealand adolescents, there is a need to develop one as a cost-effective way to assess adolescents' food patterns. This study aims to examine the test-retest reliability and relative validity of the New Zealand Adolescent FFQ (NZAFFQ) to assess food group intake in adolescents aged 14 to 18 years.
METHODS
A non-quantitative (without portion size), 72-item FFQ was developed and pretested. Fifty-two participants (aged 14.9 ± 0.8 years) completed the NZAFFQ twice within a two-week period for test-retest reliability. Forty-one participants (aged 15.1 ± 0.9 years) completed a four-day estimated food record (4DFR) in addition to the FFQs to enable assessment of validity. Spearman's correlations and cross-classification analyses were used to examine relative validity while intra-class correlations were additionally used for test-retest reliability.
RESULTS
Weekly intakes were estimated for each food item and aggregated into 34 food groups. The median Spearman's correlation coefficient (SCC) between FFQ administrations was 0.71. SCCs ranged from 0.46 for fruit juice or cordial to 0.87 for non-standard milk. The median intra-class correlation coefficient (ICC) between FFQ administrations was 0.69. The median SCC between food groups from the FFQ and the 4DFR was 0.40 with the highest SCC seen for standard milk (0.70). The exact agreement between the methods in ranking participants into thirds was highest for meat alternatives (78%), but lowest for red or yellow vegetables and potatoes (27%). The mean percent of participants misclassified into extreme thirds for food group intake was 12%.
CONCLUSIONS
Despite a small sample size, the NZAFFQ exhibited good to excellent short-term test-retest reliability and reasonable validity in ranking the majority of the food group intakes among adolescents aged 14 to 18 years. The comparability of the validity to that in the current literature suggests that the NZAFFQ may be used among adolescent New Zealanders to identify dietary patterns and rank them according to food group intake.
背景
由于目前新西兰青少年使用的食物频率问卷（FFQ）并不适用，因此需要开发一种经济有效的方法来评估青少年的食物模式。本研究旨在检验新西兰青少年 FFQ（NZAFFQ）评估 14 至 18 岁青少年食物组摄入量的重测信度和相对效度。
方法
开发了一个非定量（无份量）的 72 项 FFQ，并进行了预测试。52 名参与者（年龄 14.9±0.8 岁）在两周内两次完成 NZAFFQ 以评估重测信度。41 名参与者（年龄 15.1±0.9 岁）除了 FFQ 外还完成了为期四天的估计食物记录（4DFR），以评估有效性。Spearman 相关系数和交叉分类分析用于评估相对有效性，而内类相关系数则用于评估重测信度。
结果
对每种食物的每周摄入量进行了估计，并将其汇总为 34 种食物组。FFQ 两次测量的中位数 Spearman 相关系数（SCC）为 0.71。SCC 范围从果汁或甜饮料的 0.46 到非标准牛奶的 0.87。FFQ 两次测量的中位数内类相关系数（ICC）为 0.69。FFQ 和 4DFR 中食物组的中位数 SCC 为 0.40，标准牛奶的 SCC 最高（0.70）。两种方法将参与者分为三分位的精确一致性最高的是肉类替代品（78%），但红色或黄色蔬菜和土豆（27%）最低。在食物组摄入量方面，12%的参与者被错误地归类为极端三分位。
结论
尽管样本量较小，但 NZAFFQ 在评估 14 至 18 岁青少年的大多数食物组摄入量的短期重测信度和有效性方面表现良好至优秀。其有效性与当前文献中的可比性表明，NZAFFQ 可用于新西兰青少年，以确定饮食模式并根据食物组摄入量对其进行排名。
Zotero 插件