Participants who commenced heroin use via injecting were also older than those who first used a non-injecting route of heroin administration, possibly indicating an overall shift toward non-injecting routes of administration. A number of interventions aimed at reducing the incidence of transition to injecting have received attention [15]. One study found that brief interventions delivered through existing drug services can have an impact on injecting drug users' behaviour, however, the study was modest and further research is warranted [26].
