Students' beliefs and behaviour regarding low-calorie beverages, sweets or snacks: Are they affected by lessons on healthy food and by changes to school vending machines?

Paul L. Kocken*, Nicole M.C. van Kesteren, Goof Buijs, Jeltje Snel, Elise Dusseldorp

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

Objective: To study the effects of school lessons about healthy food on adolescents' self-reported beliefs and behaviour regarding the purchase and consumption of soft drinks, water and extra foods, including sweets and snacks. The lessons were combined with the introduction of lower-calorie foods, food labelling and price reductions in school vending machines. Design: A cluster-randomized controlled design was used to allocate schools to an experimental group (i.e. lessons and changes to school vending machines) and a control group (i.e. 'care as usual'). Questionnaires were used pre-test and post-test to assess students' self-reported purchase of extra products and their knowledge and beliefs regarding the consumption of low-calorie products. Setting Secondary schools in the Netherlands. Subjects: Twelve schools participated in the experimental group (303 students) and fourteen in the control group (311 students). The students' mean age was 13·6 years, 71·5% were of native Dutch origin and mean BMI was 18·9 kg/m2. Results: At post-test, the experimental group knew significantly more about healthy food than the control group. Fewer students in the experimental group (43%) than in the control group (56%) reported bringing soft drinks from home. There was no significant effect on attitude, social norm, perceived behavioural control and intention regarding the consumption of low-calorie extra products. Conclusions: The intervention had limited effects on students' knowledge and self-reported behaviour, and no effect on their beliefs regarding low-calorie beverages, sweets or snacks. We recommend a combined educational and environmental intervention of longer duration and engaging parents. More research into the effects of such interventions is needed.

Original languageEnglish
Pages (from-to)1545-1553
Number of pages9
JournalPublic Health Nutrition
Volume18
Issue number9
DOIs
Publication statusPublished - 16 Jan 2015

Bibliographical note

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© 2014 The Authors.

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