Hunsberger Monica, O'Malley Jean, Block Torin, Norris Jean C
University of Gothenburg, Public Health Epidemiology and Community Medicine, Gothenburg, Sweden.
Matern Child Nutr. 2015 Apr;11(2):260-70. doi: 10.1111/j.1740-8709.2012.00446.x. Epub 2012 Sep 24.
Food frequency questionnaires (FFQs) are less time consuming and inexpensive instruments for collecting dietary intake when compared with 24-h dietary recalls or double-labelled water; however, the validation of FFQ is important as incorrect information may lead to biased conclusions about associations. Therefore, the relative validity of the Block Kids Food Screener (BKFS) developed for use with children was examined in a convenience sample of 99 youth recruited from the Portland, OR metropolitan area. Three 24-h dietary recalls served as the reference. The relative validity was analysed after natural log transformation of all variables except glycaemic index prior to correlation analysis. Daily cup equivalent totals from the BKFS and 'servings' from 24-h recalls were used to compute average daily intake of fruits, vegetables, potatoes, whole grains, legumes, meat/fish/poultry and dairy. Protein grams (g), total kcalories, glycaemic index (glucose reference), glycaemic load (glucose reference), total saturated fat (g) and added sugar (g) were also calculated by each instrument. The correlation between data obtained from the two instruments was corrected for the within-subject variation in food intake reported by the 24-h recalls using standard nutritional assessment methodology. The de-attenuated correlations in nutritional intake between the two dietary assessment instruments ranged from 0.526 for vegetables, to 0.878 for potatoes. The 24-h recall estimated higher levels of saturated fat and added sugar consumption, higher glycaemic loads and glycaemic indices; the de-attenuatted correlations of these measures ranged from 0.478 to 0.768. Assessment of Bland-Altman plots indicated no systematic difference between the two instruments for vegetable, dairy and meat/fish/poultry fat consumption. BKFS is a useful dietary assessment instrument for the nutrients and food groups it was designed to assess in children age 10-17 years.
与24小时膳食回顾法或双标水法相比，食物频率问卷（FFQ）是用于收集饮食摄入量的耗时较少且成本较低的工具；然而，FFQ的验证很重要，因为错误信息可能导致有关关联的结论出现偏差。因此，在从俄勒冈州波特兰市大都市区招募的99名青少年的便利样本中，对为儿童开发的布洛克儿童食物筛选器（BKFS）的相对有效性进行了检验。三次24小时膳食回顾法作为参考。在进行相关性分析之前，对除血糖指数外的所有变量进行自然对数转换后，分析相对有效性。BKFS的每日杯当量总数和24小时回顾法中的“份数”用于计算水果、蔬菜、土豆、全谷物、豆类、肉/鱼/禽和乳制品的平均每日摄入量。每种工具还计算了蛋白质克数（g）、总千卡、血糖指数（葡萄糖参考值）、血糖负荷（葡萄糖参考值）、总饱和脂肪（g）和添加糖（g）。使用标准营养评估方法，对24小时回顾法报告的食物摄入量中受试者内部的变化进行校正后，计算两种工具获得的数据之间的相关性。两种膳食评估工具在营养摄入量方面的去衰减相关性范围从蔬菜的0.526到土豆的0.878。24小时回顾法估计的饱和脂肪和添加糖消耗量、血糖负荷和血糖指数水平较高；这些指标的去衰减相关性范围从0.478到0.768。布兰德-奥特曼图评估表明，两种工具在蔬菜、乳制品和肉/鱼/禽脂肪消耗量方面没有系统差异。BKFS是一种有用的膳食评估工具，可用于评估10至17岁儿童中其设计所针对的营养素和食物组。
