Evans Charlotte El, Cade Janet E
Nutriti onal Epidemiology Group,School of Food Science & Nutrition,University of Leeds,Leeds LS2 9JT,UK.
Public Health Nutr. 2017 Feb;20(3):565-570. doi: 10.1017/S1368980016002251. Epub 2016 Sep 9.
In England, standards for school meals included both foods and nutrients until 2015. School policies for packed lunches are generally food based; research is needed to determine whether these are adequate or whether a small number of nutrients would potentially improve their quality.
From dietary data obtained using a weighed dietary assessment tool, a diet quality score (DQS) for packed lunches was calculated using the number of standards met out of twenty-one (eight foods and thirteen nutrients). Multilevel regression analysis determined the foods and nutrients contributing to variation in the DQS.
Eighty-nine primary schools across the four regions of the UK (England, Wales, Scotland and Northern Ireland).
British schoolchildren (n 1294), aged 8-9 years, taking a packed lunch.
The optimal model included all eight foods and seven of the thirteen nutrients, explaining 72 % of the variance in DQS. Folate, Fe and vitamin C, together with the eight food groups, explained 70 % of DQS variation.
Ideally, policies for school packed lunches should include food-based standards plus recommendations based on a small number of nutrients.
在英国，直到2015年学校膳食标准都同时涵盖食物和营养素。学校关于盒装午餐的政策通常基于食物；需要开展研究以确定这些政策是否足够，或者少量营养素是否可能提升其质量。
利用称重膳食评估工具获取膳食数据，根据在21项标准（8种食物和13种营养素）中达标的数量计算盒装午餐的饮食质量得分（DQS）。多水平回归分析确定了对DQS变化有影响的食物和营养素。
英国四个地区（英格兰、威尔士、苏格兰和北爱尔兰）的89所小学。
8至9岁自带盒装午餐的英国学童（n = 1294）。
最佳模型纳入了所有8种食物和13种营养素中的7种，解释了DQS中72%的方差。叶酸、铁和维生素C，连同8个食物组，解释了DQS变化的70%。
理想情况下，学校盒装午餐政策应包括基于食物的标准以及基于少量营养素的建议。
