Summary of the 19 studies reporting data on unassisted cessation
| Category and definition | Studies |
|---|---|
| 1. Ex-smokers or smokers who quit or attempted to quit unassisted (expressed as a number or proportion in the quantitative studies and as a statement reflecting the views of the participants in the qualitative studies) | 14 studies17 30–35 43–49 |
| 2. Characteristics of smokers who quit or attempted to quit unassisted | 6 studies16 17 32 33 36 50 |
| 3. Beliefs and attitudes about quitting unassisted | 5 studies32 35 49 51 52 |