The Relationship between Adjusting the Amount of Food before Eating a School Lunch and School Lunch Food Waste among Junior High School Students

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  • Mitsuzaki Maasa
    Graduate School of Humanities and Science, Ochanomizu University Ex-Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
  • Sakamoto Tatsuaki
    Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto

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Other Title
  • 中学生における給食喫食前の食事量調節と給食の食べ残しの関連
  • チュウガクセイ ニ オケル キュウショクキツショクゼン ノ ショクジリョウ チョウセツ ト キュウショク ノ タベ ノコシ ノ カンレン

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<p>Objective: This study investigated the relationship between adjusting the amount of food before eating a school lunch and school lunch food waste among junior high school students.</p><p>Methods: A cross-sectional study was conducted among 673 junior high school second graders in Kumamoto Prefecture from which a total of 560 valid responses were analyzed. Data pertaining to basic demographic information, height, weight, adjustment of the amount of food (staple food and main dishes) before eating a school lunch, school lunch food waste, subjective length of school lunchtime, and school lunch preference were collected. Food waste during lunchtime (leave food uneaten/never leave food uneaten) was the dependent variable, and adjusting the amount of food before eating a school lunch, including staple food and main dishes, was the independent variable. We conducted a logistic regression analysis, adjusting for basic demographic characteristics, standard weight by height, subjective length of school lunchtime, and preference of school lunch as control variables.</p><p>Results: Adjusting the amount of staple food before eating was associated with food waste during lunchtime (males: odds ratio 4.64, 95% confidence interval [1.69~12.72], females: 4.18 [2.09~8.35]). Adjusting the amount of the main dishes before eating was also associated with food waste during lunchtime (males: 9.06 [3.32~24.76], females: 4.12 [2.13~8.35]).</p><p>Conclusion: The results suggest that adjusting the amount of food before eating school lunch is associated with food waste during lunchtime.</p>

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