Nelson Melissa C, Lytle Leslie A
Division of Epidemiology and Community Health, University of Minnesota, 1300 S 2nd St, WBOB Ste 300, Minneapolis, MN 55454-1015, USA.
J Am Diet Assoc. 2009 Apr;109(4):730-4. doi: 10.1016/j.jada.2008.12.027.
Sweetened beverage and fast-food intake have been identified as important targets for obesity prevention. However, there are few brief dietary assessment tools available to evaluate these behaviors among adolescents. The objective of this research was to examine reliability and validity of a 22-item dietary screener assessing adolescent consumption of specific energy-containing and non-energy-containing beverages (nine items) and fast food (13 items). The screener was administered to adolescents (ages 11 to 18 years) recruited from the Minneapolis/St Paul, MN, metro region. One sample of adolescents completed test-retest reliability of the screener (n=33, primarily white adolescents). Another adolescent sample completed the screener along with three 24-hour dietary recalls to assess criterion validity (n=59 white adolescents). Test-retest assessments were completed approximately 7 to 14 days apart, and agreement between the two administrations of the screener was substantial, with most items yielding Spearman correlations and kappa statistics that were >0.60. When compared to the gold standard dietary recall data, findings indicate that the validity of the screener items assessing adolescents' intake of regular soda, sports drinks, milk, and water was fair. However, the differential assessment periods captured by the two methods (ie, 1 month for the screener vs 3 days for the recalls) posed challenges in analysis and made it impossible to assess the validity of some screener items. Overall while these screener items largely represent reliable measures with fair validity, our findings highlight the challenges inherent in the validation of brief dietary assessment tools.
含糖饮料和快餐的摄入已被确定为预防肥胖的重要目标。然而，几乎没有简短的饮食评估工具可用于评估青少年的这些行为。本研究的目的是检验一个包含22个条目的饮食筛查工具的信度和效度，该工具用于评估青少年对特定含能量和不含能量饮料（9个条目）及快餐（13个条目）的消费情况。该筛查工具被施用于从明尼阿波利斯/圣保罗市（明尼苏达州）都会区招募的青少年（年龄在11至18岁之间）。一组青少年完成了该筛查工具的重测信度评估（n = 33，主要为白人青少年）。另一组青少年样本完成了该筛查工具的测试，并同时进行了三次24小时饮食回顾以评估效标效度（n = 59名白人青少年）。重测评估在大约7至14天的间隔内完成，两次筛查工具施测之间的一致性很高，大多数条目产生的斯皮尔曼相关性和kappa统计值均>0.60。与金标准饮食回顾数据相比，结果表明，评估青少年常规苏打水、运动饮料、牛奶和水摄入量的筛查工具条目的效度一般。然而，两种方法所涵盖的不同评估期（即筛查工具为1个月，而饮食回顾为3天）给分析带来了挑战，使得无法评估某些筛查工具条目的效度。总体而言，虽然这些筛查工具条目在很大程度上代表了具有一定效度的可靠测量方法，但我们的研究结果凸显了简短饮食评估工具验证中固有的挑战。
