Principal study measures and years of data collection
| Data item | Years data collected |
|---|---|
| Smoking status and susceptibility | 2011–2014 |
| Smoking initiation (started in last year) | 2012–2014 |
| Perceived peer prevalence of smoking | 2012–2014 |
| Usual source of cigarettes | 2012–2014 |
| Attempted purchase from shop in past 30 days | 2011–2013 |
| Tobacco-retailing store visit frequency | 2007, 2013 |