Fig. 1

Sodium (mg/d per capita) acquired by Australian households from packaged food and beverage purchases according to income level. Low income = $954 per week or less per household, Middle = $955 - $2000 per week per household, High = $2469 per week per household. The box displays the interquartile range, and the median value is marked as the line within the box. Whiskers extend to the lowest datum within 1.5 interquartile range of the lower quartile, and the highest datum within 1.5 IQR of the upper quartile. Low income households had the highest sodium purchases per capita. *indicates a significant difference across all income levels (P < 0.01)