Fig. 1

Interrupted time-series showing the impact of a relative pricing intervention on differences between weekly purchases (quantity, n) of healthier and less healthy targeted snack foods at four retail food sites in Halifax, Nova Scotia, from April 2018 – Dec 2019. Baseline = weeks 1–66; Intervention = weeks 67–87, commencing at the dotted line. Panel A shows the aggregate outcomes across all outlets at the QEII; Panel B shows the disaggregated purchases per each of the four retail outlets. All final models were adjusted for weekly sales volume