Deakin University
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A prospective study of diet quality and mental health in adolescents

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Version 3 2024-06-17, 07:33
Version 2 2024-05-30, 15:01
Version 1 2014-10-28, 09:24
journal contribution
posted on 2024-06-17, 07:33 authored by Felice JackaFelice Jacka, P Kremer, Michael BerkMichael Berk, A de Silva-Sanigorski, Marj MoodieMarj Moodie, E Leslie, Julie PascoJulie Pasco, B Swinburn
Objectives: A number of cross-sectional and prospective studies have now been published demonstrating inverse relationships between diet quality and the common mental disorders in adults. However, there are no existing prospective studies of this association in adolescents, the onset period of most disorders, limiting inferences regarding possible causal relationships.
Methods: In this study, 3040 Australian adolescents, aged 11–18 years at baseline, were measured in 2005–6 and 2007–8. Information on diet and mental health was collected by self-report and anthropometric data by trained researchers.
Results: There were cross-sectional, dose response relationships identified between measures of both healthy (positive) and unhealthy (inverse) diets and scores on the emotional subscale of the Pediatric Quality of Life Inventory (PedsQL), where higher scores mean better mental health, before and after adjustments for age, gender, socio-economic status, dieting behaviours, body mass index and physical activity. Higher healthy diet scores at baseline also predicted higher PedsQL scores at follow-up, while higher unhealthy diet scores at baseline predicted lower PedsQL scores at follow-up. Improvements in diet quality were mirrored by improvements in mental health over the follow-up period, while deteriorating diet quality was associated with poorer psychological functioning. Finally, results did not support the reverse causality hypothesis.
Conclusion: This study highlights the importance of diet in adolescence and its potential role in modifying mental health over the life course. Given that the majority of common mental health problems first manifest in adolescence, intervention studies are now required to test the effectiveness of preventing the common mental disorders through dietary modification.



PLos one



Article number

ARTN e24805




San Francisco, Calif.

Open access

  • Yes








This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2011, Public Library of Science


Scott JG




Public Library of Science