This study looked inside the lunchboxes of over 2000 children in 12 Catholic primary schools in the Hunter region of New South Wales. The lunchbox contents were grouped into ‘everyday’ (healthy) food and drinks, and discretionary (sometimes) food and drinks. The total number of kilojoules contained in the lunchbox was also calculated. The study found differences between children in grades K-2 compared to children in grades 3-6, as well as large differences between students from advantaged and disadvantaged areas.
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Sutherland R, Nathan N, Brown A, Yoong SL, Reynolds R, Walton A, Janssen L, Desmet C, Lecathelinais C,Gillham K, Herrmann V, Wolfenden L. A cross-sectional study to determine the energy density and nutritional quality of primary school lunchboxes. Public Health Nutrition. 2020 Apr;23(6):1108-16. doi:10.1017/S1368980019003379.