Preston Alan M, Palacios Cristina, Rodríguez Cindy A, Vélez-Rodríguez Rose M
Department of Biochemistry, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico.
P R Health Sci J. 2011 Jun;30(2):58-64.
Knowledge of the diet of specific populations is of importance in the assessment of nutrient intake. Herein, we assess the reproducibility and validity of an interviewer-administered food frequency questionnaire (FFQ) in Puerto Rican children at two educational levels--elementary (ES) and high school (HS).
The FFQ contained 97 items including supplements. It was administered twice (FFQ1 and FFQ2) within a 2 week interval between which three dietary food records (DFR's) were collected. In all, 94 ES children (40 boys and 54 girls) and 89 HS children (42 boys and 47 girls) participated in this IRB-approved study.
Results showed correlations between FFQ1 and FFQ2 for representative macro- and micronutrients lower than reported in the literature. Correlation coefficients were higher for HS (mean R = 0.43) compared to ES (mean R = 0.21) and higher for girls than for boys at both school levels. Results for validation also showed lower correlations between the FFQ2 and DFR's compared to other studies, which was higher in HS students (mean R = 0.34) compared to ES students (mean R = 0.10). However, these same nutrients were cross-classified into equivalent quartiles for both the FFQ and DFR with an accuracy of about 66%.
We have designed and validated a FFQ, appropriate for use in Puerto Rican schoolchildren to estimate energy intake in younger students and energy and micronutrients in older students. The significance of this research is that there is now an updated instrument for use in dietary studies in Puerto Rican youth.
了解特定人群的饮食情况对于评估营养摄入至关重要。在此，我们评估了一种由访谈员实施的食物频率问卷（FFQ）在波多黎各两个教育水平（小学和高中）儿童中的可重复性和有效性。
该FFQ包含97个项目，包括补充剂。在两周的间隔内进行了两次问卷调查（FFQ1和FFQ2），在此期间收集了三份饮食记录（DFR）。共有94名小学儿童（40名男孩和54名女孩）和89名高中儿童（42名男孩和47名女孩）参与了这项经机构审查委员会批准的研究。
结果显示，FFQ1和FFQ2之间代表性宏量营养素和微量营养素的相关性低于文献报道。与小学儿童（平均R = 0.21）相比，高中儿童的相关系数更高（平均R = 0.43），并且在两个学校水平上女孩的相关系数均高于男孩。验证结果还显示，与其他研究相比，FFQ2与DFR之间的相关性较低，高中生（平均R = 0.34）高于小学生（平均R = 0.10）。然而，对于FFQ和DFR，这些相同的营养素被交叉分类到等效四分位数中，准确率约为66%。
我们设计并验证了一种FFQ，适用于波多黎各学童，用于估计低年级学生的能量摄入量以及高年级学生的能量和微量营养素摄入量。这项研究的意义在于，现在有了一种更新的工具可用于波多黎各青少年的饮食研究。
