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Association of the Healthy, Hunger-Free Kids Act With Dietary Quality Among Children in the US National School Lunch Program

Educational Objective
To learn about dietary quality associated with participation in the National School Lunch Program.
1 Credit CME
Key Points

Question  Was there an association between the Healthy, Hunger-Free Kids Act of 2010 and dietary quality of lunch among students participating in the National School Lunch Program (NSLP)?

Findings  In a serial cross-sectional study of 6389 students, the Healthy, Hunger-Free Kids Act of 2010 was associated with statistically significant mean differences in prepolicy vs postpolicy Healthy Eating Index-2010 scores of 11.9 for low-income NSLP participants vs −0.7 for low-income NSLP nonparticipants, 14.3 for low-middle–income NSLP participants vs 2.0 for low-middle–income nonparticipants, and 12.8 for middle-high–income NSLP participants vs 4.7 for middle-high–income nonparticipants.

Meaning  The Healthy, Hunger-Free Kids Act of 2010 was associated with better dietary quality for lunch among low-income, low-middle–income, and middle-high–income students estimated to be participants in the NSLP.

Abstract

Importance  The Healthy, Hunger-Free Kids Act of 2010, implemented nationwide in 2012, was intended to improve the nutritional quality of meals served in the National School Lunch Program (NSLP).

Objective  To assess whether there was an association between the Healthy, Hunger-Free Kids Act of 2010 and dietary quality of lunch for students participating in the NSLP, stratified by income.

Design, Setting, Participants  Serial cross-sectional study design, using National Health and Nutrition Examination Survey (NHANES) data from 2007-2008, 2009-2010, 2013-2014, and 2015-2016, of students who were surveyed in the NHANES and were attending schools participating in the NSLP. Individuals who were aged 5 to 18 years, in kindergarten through 12th grade, enrolled in a school that served school lunch, and had a reliable weekday dietary recall were included.

Exposures  The Healthy, Hunger-Free Kids Act of 2010 (prepolicy period: 2007-2010; postpolicy period: 2013-2016), with participation in the NSLP estimated based on an algorithm.

Main Outcomes and Measures  The primary outcome was dietary quality of intake for lunch, measured by the Healthy Eating Index-2010 (HEI-2010) score (range, 0-100; 0 indicates a diet with no adherence to the 2010 Dietary Guidelines for Americans and 100 indicates a diet with complete adherence to the guidelines).

Results  Among 6389 students included in the surveys (mean age, 11.7 [95% CI, 11.6-11.9] years; 3145 [50%] female students; 1880 [56%] were non-Hispanic white), 32% were low-income, 12% were low-middle–income, and 56% were middle-high–income students. A total of 2472 (39%) were participants in the NSLP. Among low-income students, the adjusted mean prepolicy HEI-2010 score was 42.7 and the postpolicy score was 54.6 among NSLP participants and the adjusted mean prepolicy score was 34.8 and postpolicy score was 34.1 among NSLP nonparticipants (difference in differences, 12.6 [95% CI, 8.9-16.3]). Among low-middle–income students, the adjusted mean prepolicy HEI-2010 score was 40.4 and postpolicy score was 54.8 among NSLP participants and the adjusted mean prepolicy score was 34.2 and postpolicy score was 36.1 among NSLP nonparticipants (difference in differences, 12.4 [95% CI, 4.9-19.9]). Among middle-high–income students, the adjusted mean HEI-2010 prepolicy score was 42.7 and postpolicy score 55.5 for NSLP participants and the adjusted mean prepolicy score was 38.9 and prepolicy score was 43.6 for NSLP nonparticipants (difference in differences, 8.1 [95% CI, 4.2-12.0]).

Conclusions and Relevance  In a serial cross-sectional study of students, the Healthy, Hunger-Free Kids Act of 2010 was associated with better changes in dietary quality for lunch among presumed low-income, low-middle–income, and middle-high–income participants in the NSLP compared with nonparticipants.

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Article Information

Corresponding Author: Kelsey Kinderknecht, BS, UW Nutritional Sciences Program, University of Washington, 305 Raitt Hall, PO Box 353410, Seattle, WA 98195-3410 (kkinder3@uw.edu).

Accepted for Publication: May 18, 2020.

Author Contributions: Ms Kinderknecht and Dr Jones-Smith had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.

Concept and design: Kinderknecht, Jones-Smith.

Acquisition, analysis, or interpretation of data: All authors.

Drafting of the manuscript: Kinderknecht, Jones-Smith.

Critical revision of the manuscript for important intellectual content: All authors.

Statistical analysis: Kinderknecht, Jones-Smith.

Supervision: Harris, Jones-Smith.

Conflict of Interest Disclosures: Ms Kinderknecht reported receiving a grant from Health Resources and Services Administration during the conduct of the study. Dr Harris reported receiving a grant from Health Resources and Services Administration during the conduct of the study. No other disclosures were reported.

Funding/Support: Ms Kinderknecht and Dr Harris were supported in this project by the Health Resources and Services Administration of the US Department of Health and Human Services under grant number T79MC00013 (Partners in Excellence for Training in MCH Nutrition).

Role of the Funder/Sponsor: The funder had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.

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