College of Natural & Applied Sciences, University of Guam, Mangilao, Guam;
College of Natural & Applied Sciences, University of Guam, Mangilao, Guam.
Food Nutr Res. 2015 May 5;59:26276. doi: 10.3402/fnr.v59.26276. eCollection 2015.
Guam is a US territory in the western Pacific with a diverse population that includes understudied ethnic groups such as Chamorros and Filipinos. A food frequency questionnaire (FFQ) to estimate dietary intake was needed to facilitate studies of diet and health among adults living in Guam.
To develop and validate an FFQ to assess dietary intake over a 1-year period among adult Guam residents.
A three-part study was conducted: 1) an initial cross-sectional study using 24-h recalls to identify a food and beverage list for the FFQ and resulting in a final FFQ containing 142 food and drink items; 2) to test reliability, 56 different individuals completed the FFQ twice; and 3) to test relative validity, self-administered FFQs and up to 2 days of food record data from an additional 109 individuals were collected, and daily nutrient intake from the two methods was compared.
The reliability of the FFQ was very good (ρ range=0.65-0.75), and the relative validity of the FFQ was good for women (median Spearman's correlation [ρ] between instruments of 0.45 across 20 nutrients and an interquartile range [IQR] of 0.42-0.58) and generally adequate for men (median ρ=0.31, IQR=0.23-0.55). Validity was also good for Chamorros (median ρ=0.47, IQR=0.38-0.53) and generally adequate for Filipinos (median ρ=0.42, IQR=0.20-0.62). Correlations after energy adjustment were lower (overall median ρ=0.20, IQR=0.14-0.26).
The FFQ can be used to rank nutrient intake for adults in Guam and may be helpful in the analysis of relationships between diet and chronic disease in Guam.
关岛是位于西太平洋的美国领土，其人口结构多样，包括研究较少的族群，如查莫罗人和菲律宾人。为了方便研究关岛居民的饮食与健康，需要开发一种食物频率问卷（FFQ）来评估他们的饮食摄入情况。
开发并验证一种用于评估关岛成年居民 1 年饮食摄入情况的 FFQ。
该研究分为三个部分：1）初始的横断面研究使用 24 小时回顾法来确定 FFQ 的食物和饮料清单，最终的 FFQ 包含 142 种食物和饮料；2）为了检验可靠性，56 名不同的个体完成了 FFQ 的两次填写；3）为了检验相对有效性，从另外 109 名个体中收集了自我管理的 FFQ 和最多 2 天的食物记录数据，并比较了两种方法的每日营养素摄入量。
FFQ 的可靠性非常好（ρ 范围=0.65-0.75），对于女性，FFQ 的相对有效性较好（两种工具之间的中位数 Spearman 相关系数[ρ]为 20 种营养素中的 0.45，四分位间距[IQR]为 0.42-0.58），对于男性，总体上也足够好（中位数 ρ=0.31，IQR=0.23-0.55）。对于查莫罗人，有效性也较好（中位数 ρ=0.47，IQR=0.38-0.53），对于菲律宾人，总体上也足够好（中位数 ρ=0.42，IQR=0.20-0.62）。经过能量调整后的相关性较低（总体中位数 ρ=0.20，IQR=0.14-0.26）。
FFQ 可用于对关岛成年人的营养素摄入量进行排序，并且可能有助于分析关岛饮食与慢性病之间的关系。
