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弗吉尼亚州提供免费餐食的小学中的沙拉吧与能量摄入

Salad bars and energy intake in Virginia elementary schools with free meals.

作者信息

Bean Melanie K, Thornton Laura M, Mazzeo Suzanne E, Raynor Hollie A

机构信息

Department of Pediatrics, Children's Hospital of Richmond at Virginia Commonwealth University, 2303 N. Parham Rd, Suite 1, Richmond, VA 23229, United States.

Department of Psychiatry, University of North Carolina at Chapel Hill, 101 Manning Drive, Chapel Hill, NC 27599, United States.

出版信息

Prev Med Rep. 2021 Aug 12;24:101515. doi: 10.1016/j.pmedr.2021.101515. eCollection 2021 Dec.

Abstract

School salad bars are widely promoted as a means to increase adherence to National School Lunch Program (NSLP) nutrition mandates. Yet it is unknown how salad bars or fruit and vegetable (F&V) intake relates to energy intake within the NSLP, or if F&Vs displace energy from other sources. This relation is particularly important to understand among children from minoritized backgrounds, who are at high risk of obesity and food insecurity, and the most likely to be impacted by school food policies, given their reliance on school meals. This study purpose was to evaluate if school salad bars and F&V intake are associated with lower lunch energy intake. Energy intake in Virginia elementary schools with and without salad bars, and associations between F&V energy and other energy sources, were examined. Cross-sectional plate waste assessments were conducted in matched school pairs (3 with, 3 without salad bars; N = 1,102 students; >90% Black and Latinx; 100% free meals). Two-level hierarchical models assessed group differences in energy intake and the proportion of energy from each meal component. Mean total lunch energy intake was 304 ± 157 kcal (salad bar); 269 ± 152 kcal (no salad bar). Students in salad bar schools consumed more energy from vegetables (+11 kcal;  < .001). Energy intake patterns were inconsistent across pairs. F&V energy was not associated with non-F&V energy ( = 1.04,  = .31). Findings do not suggest that salad bars were associated with lower energy intake. Evidence was inconsistent regarding F&V displacement of other lunch calories. Further research regarding F&V, salad bars, and energy intake is needed.

摘要

学校沙拉吧被广泛宣传为一种提高对国家学校午餐计划(NSLP)营养规定遵守程度的手段。然而,尚不清楚沙拉吧或水果和蔬菜(F&V)摄入量与NSLP中的能量摄入有何关系,或者F&V是否会取代其他来源的能量。了解这种关系对于来自少数族裔背景的儿童尤为重要,他们肥胖和粮食不安全的风险很高,而且由于依赖学校膳食,最有可能受到学校食品政策的影响。本研究的目的是评估学校沙拉吧和F&V摄入量是否与较低的午餐能量摄入有关。研究了弗吉尼亚州有沙拉吧和没有沙拉吧的小学的能量摄入情况,以及F&V能量与其他能量来源之间的关联。在匹配的学校对中进行了横断面餐盘浪费评估(3所设有沙拉吧,3所没有沙拉吧;N = 1102名学生;超过90%为黑人和拉丁裔;100%享受免费膳食)。两级分层模型评估了能量摄入的组间差异以及每餐各成分能量所占比例。午餐平均总能量摄入量为304±157千卡(有沙拉吧);269±152千卡(没有沙拉吧)。有沙拉吧学校的学生从蔬菜中摄入的能量更多(多11千卡;P <.001)。各对学校之间的能量摄入模式不一致。F&V能量与非F&V能量无关(β = 1.04,P =.31)。研究结果并不表明沙拉吧与较低的能量摄入有关。关于F&V取代其他午餐热量的证据并不一致。需要对F&V、沙拉吧和能量摄入进行进一步研究。

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