Table 1

Preintervention and postintervention values for measures and significance of preintervention and postintervention differences

MeasureN*Preintervention*Postintervention*χ² or t-statisticP value
Total N (March 2014 to October 2017)74 38836 90537 483
Total N (November 2015 to October 2017)40 832334937 483
Demographics (March 2014 to October 2017)74 388
 Men49.049.0
 Women51.051.07.9 <0.01
 16–34 years old31.131.1
 35–64 years old48.147.9
 65+ years old20.821.1105.0 <0.01
Drinker in last six months (November 2015 to October 2017)26 335 68.1 65.7 6.5 0.01
 Aware of guidelines26 30686.087.01.60.20
 Identifies guidelines as 14 units per week22 466 21.4 23.9 16.6 <0.01
 Last month exposure to guideline via:19 548
 Product label20.122.12.60.11
 TV or radio 34.2 39.1 11.8 <0.01
 Newspapers or magazines15.817.62.50.11
 Websites or social media6.07.53.70.05
 Shops or supermarkets8.38.30.00.98
 Pubs, bars or nightclubs 13.0 11.1 4.5 0.03
 Place of work or study6.57.41.10.30
 Health professional8.98.01.50.22
 Health service11.111.70.50.47
 Friends, family or colleagues6.47.52.00.16
 Other 1.4 0.6 9.4 <0.01
 In any location 71.7 76.5 20.9 <0.01
COM-B measures
 Can drink only up to two units before harm24 24534.235.61.260.26
 Easy to drink moderately26 20382.582.00.240.63
 Tracks units26 27426.725.90.460.50
 Lifestyle makes it easy26 143 76.9 79.4 6.5 0.01
 Know where to get advice26 233 78.6 82.3 16.0 <0.01
 Trying not to drink more than is good for me26 063 48.7 51.2 3.8 0.05
 Intends to drink moderately26 24977.077.50.20.65
 Wants to avoid drinking excessively26 24776.076.40.20.69
 Trying to avoid drinking excessively26 22439.339.60.10.77
 Concerned by drinking too much26 25624.423.80.30.56
Drinker in last 6 months (March 2014 to October 2017)48 875 70.4 65.7 163.7 <0.01
 AUDIT-C score (mean)48 696 4.1 4.4 −10.2 <0.01
 Litres ethanol per adult 16+ (mean)0.810.790.64†0.26
 Assaults (mean)2261.72197.61.0†0.16
 Alcohol poisonings (mean)190.9186.20.7†0.25
November 2015 to October 2017
 Graduated frequency weekly units (mean)22 4049.79.9†−0.30.61
 Exceeding 14 units per week22 40419.521.02.20.19
  • *Unweighted Ns and weighted column percentages unless identified as means.

  • †Test statistic is the t-statistic. Rows in bold are significant preintervention/postintervention differences at the 0.05 level.