Table 1 Examples of diverse outcome measures

Change in awareness

Awareness that an institution had a no-smoking policy

Awareness that health warnings on cigarette packs had been changed

Change in attitude

Answer to the question 'Do you think young people who smoke have more friends?'

Change in perceived availability

Reported ease of obtaining cigarettes from shops

Change in self-reported smoking status

Prevalence of 'regular' smoking (at least one cigarette per day)

Incidence of quitting