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Impact of 20% price increase in high sugar snacks on change in annual energy purchase by body mass index (BMI) and household income. Stratification by household income (low <£20 000, middle £20 000-49 999, high ≥£50 000) and BMI. 1 kcal=4.18 kJ=0.00418 MJ). £1.00=$1.2; €1.1. Confectionery includes chocolate. Whiskers represent 95% confidence intervals
