Association between tax on sugar sweetened beverages and soft drink consumption in adults in Mexico: open cohort longitudinal analysis of Health Workers Cohort Study.

Effect modification of sugar sweetened drink tax by income and education category As a secondary analysis, we assessed the potential effect modification of the tax at different levels of individual income (low, middle, or high); the interaction between income and tax was marginally significant only for the middle income group (appendix table A1-3).

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