The direct and indirect associations of usual free sugar intake on BMI z-scores of Australian children and adolescents.

This cross-sectional analysis aimed to assess the association between free sugar consumption and the BMI z-score of Australian children and adolescents. Data from the 2007 Australian National Children's Nutrition and Physical Activity Survey were analyzed. Structural equation modeling was used to assess the direct association between usual free sugar intake and age-and-sex-specific BMI z-score, and the indirect association mediated via energy overconsumption. Weak and statistically non-significant associations were found for the direct (BMI z-score β = -0.02 per 10% change in energy intake from free sugar, p = 0.705) and indirect pathways (BMI z-score β = -0.04 per 10% change in energy intake from free sugar, p = 0.705). We concluded that free sugar intake was not associated with BMI z-score in this cohort. Instead of focusing on a single energy source in the diet, improving the quality of the whole diet may be a better approach in tackling childhood obesity.