Studies reviewed by intervention type
| Intervention | Reviews | Primary research | Total |
|---|---|---|---|
| Price increases | 2* | 7* | 9* |
| Smoke-free environments | 1* | 12* | 13* |
| Educational media campaigns | 3 | 12* | 15* |
| Advertising bans | – | – | – |
| Health warnings | – | – | – |
| Smoking cessation support | 2 | 44* | 46* |
| Multifaceted approaches (community-based programmes) | – | 4 | 4 |
| All interventions | 7 | 77 | 84 |
*The sum of study numbers listed in each column (Reviews, Primary research, Total) is greater than the total given in the final row (All interventions) because one review20 and one primary study19 examined the impact of both price increases and smoke-free environments while another study examined the impact of both an educational media campaign and cessation support.31