Interventions with retailers to reduce cigarette sales to minors: a randomised controlled trial

Interventions with retailers to cut down on cigarette sales to minors in Australia have been studied in a randomized controlled trial. Neither intervention achieved significant improvements for the two key behavioral outcomes, which were requiring proof of age and displaying a warning sign. Knowing about the law was not shown to have an intervention effect. Interventions may have been partly successful in modifying attitudes of retailers. One group received an educational letter and the other received a threat of enforcement of laws followed by a visit from a public health officer.