Characteristics of all 2114 eligible patients, the 225 patients lost to follow-up (FU), and the 1529 patients completed the routine 6-month FU interview, presented as median (IQR) or %.
| Eligible patients, n=2114 | Lost to FU, n=225 | Completed FU, n=1529 | |
| Age (years), median (IQR) (no unknown) | 55 (42–64) | 52 (39–62) | 56 (43–65) |
| Males (no unknown) | 48% | 43% | 49% |
| Education (3% unknown) | |||
| No education | 30% | 26% | 30% |
| Short | 47% | 42% | 48% |
| Medium long | 16% | 24% | 15% |
| Long | 5% | 6% | 5% |
| Being employed (5% unknown) | 56% | 48% | 57% |
| Being disadvantaged* (3% unknown) | 66% | 56% | 68% |
| Smoking (94%) and nicotine (6%) history | |||
| Heavy smoking† (1% unknown) | 71% | 70% | 70% |
| Pack-years, median (IQR) (11% unknown) | 28 (14–43) | 24 (12–38) | 28 (15–44) |
| Fagerström nicotine dependency (scale 0–10) median (IQR) (1% unknown) | 5 (4–7) | 5 (4–7) | 5 (4–7) |
| ≥20 g of tobacco per day (1% unknown) | 22% | 19% | 22% |
| Previous quit attempts (2% unknown) | 57% | 63% | 57% |
| Living with smoker (3% unknown) | 27% | 29% | 26% |
| Smoking cessation intervention | |||
| Encouraged by healthcare personal (2% unknown) | 68% | 60% | 68% |
| Group format (1% unknown) | 70% | 79% | 69% |
| Nicotine replacement therapy (1% unknown) | 60% | 57% | 60% |
| Compliance with programme (1% unknown)‡ | 61% | 55% | 66% |
| Successful quitting after intervention (12% unknown) | 51% | 55% | 53% |
*Disadvantaged: unemployed and/or no education (except primary to high schooling and/or short work-related courses).
†Heavy smokers: smoking≥20 pack-years, Fagerström Score 7–10 and/or daily smoking≥20 cigarettes.
‡Compliance: attended≥75% of the scheduled sessions.