Do financial constraint and perceived stress modify the effects of food tax schemes on food purchases: moderation analyses in a virtual supermarket experiment.
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Open Access
Type
Article
Language
en
Date
2024-01-15
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Title
Do financial constraint and perceived stress modify the effects of food tax schemes on food purchases: moderation analyses in a virtual supermarket experiment.
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Published in
Public Health Nutr 2024;1-35;online ahead of print
Abstract
Moderation analyses were conducted with data from a trial where participants were randomly exposed to: a control condition with regular food prices, an SSB tax condition with a two-tiered levy on the sugar content in SSBs (5-8 g/100ml: €0.21/l and ≥8g/100 ml: €0.28/l) or a nutrient profiling tax condition where products with Nutri-Score D or E were taxed at a 20 percent level. Outcome measures were: overall healthiness of food purchases (%), energy content (kcal) and SSB purchases (litres). Effect modification was analyzed by adding interaction terms between conditions and self-reported financial constraint or perceived stress in regression models. Outcomes for each combination of condition and level of effect modifier were visualized.