Analysis
The analytic sample included 325 participants with complete data on the primary outcome in the main trial, excluding one person with missing data on the primary outcome of purchasing any SSB. Mediation analyses used the MacKinnon approach [
Primary mediation modelAnalyses used the PROCESS macro for SPSS (version 4.1) [We planned not to adjust for covariates in based on CONSORT 2010 guidance for RCTs recommending that adjustment is only needed for variables with strong prognostic strength (e.g., stratification variables) [