The impact of introducing alcohol-free beer options in bars and public houses on alcohol sales and revenue: A randomised crossover field trial

This was a randomised four-period crossover (i.e., multiple-treatment reversal) trial investigating the effect of availability of draught alcohol-free beer on consumption. Fourteen bars in the UK took part. All participating venues completed two intervention periods (serving draught alcohol-free beer) and two control periods (NOT serving draught alcohol-free beer), lasting a total of 8 weeks. The primary outcome was the mean volume (in litres) of draught alcoholic beer sold weekly, which was compared between intervention and control periods. The secondary outcome was the total revenue from all drinks served, which was again compared between intervention and control periods.