For meat-free products, there was an increasing trend in sales (units per store per week) in the Phase II stores and a significant change in meat-free products after implementation of Phase II ( P < 0·001 for differences between Phase I versus Phase II stores) followed by an increasing trend in both Phase I and Phase II stores.
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Estimating the effect of moving meat-free products to the meat aisle on sales of meat and meat-free products: A non-randomised controlled intervention study in a large UK supermarket chain.
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In interrupted time series analyses, there was a declining trend in sales (units per store per week) of meat products before the intervention in both Phase I and Phase II stores and a small significant level change in meat products after implementation ( P < 0·001 for differences between Phase I versus Phase II stores), followed by a slightly increasing trend in meat products after the intervention in both Phase I and Phase II stores.
Interrupted time series analyses of the main intervention Phase I (February to April 2019) showed consistent results ( Fig 2 , Figs B and C in S3 Appendix ), with a decreasing trend in baseline sales (units and £ per store per week) of meat products before and after the intervention and no significant difference in the trend in sales of meat products after implementation ( P = 0.7 for differences between intervention versus control stores).