Of all participants, 63.3% reported significantly larger portions of French fries than recommended. For meat this was 77.3%, for vegetables 47.6% and for chips 77%. Portion size varied across sex and socioeconomic groups and was positively associated with the frequency of consumption. Better diet quality was associated with larger portions of vegetables and smaller portions of French fries and chips. Obese children reported larger portions of vegetables but not of other foods.

In conclusion: Children's portion size exceeds recommendations significantly and is higher among frequent consumers. Prevention efforts may focus on the promotion of larger portions of vegetables and reduction of portions of French fries and chips. This may improve diet quality and reduce obesity. The findings seem consistent with literature on under-reporting of food intake by obese subjects.