| Methods |
Non‐randomised controlled trial. |
| Participants |
29 drinking venues in Melbourne where public breathalysers were available. |
| Interventions |
Two levels of intervention to promote use of the public breathalysers, at three levels of breathalyser cost. |
| Outcomes |
Use of breathalysers by ‘intending drivers’. |
| Notes |
Published outcome data cannot be interpreted. Data shown only as bar charts and actual figures not supplied. Also it is stated that there was no promotional activity in the control venues but the outcome data for the control group is shown by promotion level. One author (Vulcan) was contacted but no longer has original data. Other authors cannot be traced. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Adequate sequence generation? |
Unclear risk |
Hotels Association provided list of potential participants. No information provided as to how venues were allocated to the control or intervention groups. |
| Allocation concealment? |
Unclear risk |
No information reported. |
| Blinding?
All outcomes |
Unclear risk |
No information reported. |
| Confounders |
Unclear risk |
Not reported. |
| Data collection methods |
Low risk |
Use of breathalyser machines as recorded on these devices. |
| Withdrawals & dropouts |
Unclear risk |
Number of venues appears to be greater post‐intervention than pre‐intervention. |
| Intervention integrity |
Unclear risk |
No information reported as to whether promotion activities were completed at all interventions. |
| Duration of follow‐up |
Unclear risk |
From the information reported, it is not possible to determine how long data was recorded following the promotional activity. |
