Nutrient adequacy of Japanese schoolchildren on days with and without a school lunch by household income

  • Chika Horikawa University of Niigata Prefecture
  • Nobuko Murayama
  • Hiromi Ishida
  • Taeko Yamamoto
  • Sayaka Hazano
  • Akemi Nakanishi
  • Yumi Arai
  • Miho Nozue
  • Yukiko Yoshioka
  • Saori Saito
  • Aya Abe
Keywords: Japan, household income, schoolchildren, nutrient adequacy, dietary reference intakes

Abstract

Background: Evidence for whether the nutrient intakes of Japanese schoolchildren differ according to household income is sparse.

Objective: We investigated the role of school lunches for nutrient adequacy among Japanese primary school children using dietary reference intakes in a cross-sectional survey.

Design: Participants were 10- to 11-year-old (5th grade) children from 19 public primary schools in four prefectures of East Japan, and 836 children were analyzed. The participants completed 24-h dietary records with photographs of their meals for 4 consecutive days, composed of 2 days with and 2 days without a school lunch. Children’s household income was obtained from questionnaires that were completed by the participants’ guardians and divided into the following three categories: low (0.2236–2.2361 million yen; n = 319), middle (2.3333–2.8868 million yen; n = 194), and high (3.1305–6.3640 million yen; n = 323). Logistic regression analyses were used to estimate the odds ratios for whether participants had poor nutrient intakes, with adjustment for confounders.

Results: On days without a school lunch, the prevalence of nutrient shortages was significantly higher compared with those on days with a school lunch for most macro- and micronutrients among all three levels of household income. Children from low-income households had higher rates of nutrient shortages for vitamin B6, pantothenic acid, K, Mg, P, Fe, and Zn than those from middle-income households on days without a school lunch (P = 0.004, 0.001, 0.001, 0.006, 0.037, <0.001, and 0.015, respectively), but those differences were not significant on days with a school lunch.

Conclusion: The findings suggest that school lunches are important for achieving adequate nutrient intakes in schoolchildren and reduce disparities of adequate nutrient intake by household income levels.

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References


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Published
2020-12-11
How to Cite
Horikawa, C., Murayama, N., Ishida, H., Yamamoto, T., Hazano, S., Nakanishi, A., Arai, Y., Nozue, M., Yoshioka, Y., Saito, S., & Abe, A. (2020). Nutrient adequacy of Japanese schoolchildren on days with and without a school lunch by household income. Food & Nutrition Research, 64. https://doi.org/10.29219/fnr.v64.5377
Section
Original Articles