Inclusion and follow up
| Strategy A | Strategy B | |
| Number | Number | |
| Work site physicians | 13 | 15 |
| Baseline | ||
| Subjects at inclusion | 1773 | 2110 |
| among which: smokers | 579 (33%) | 690 (33%) |
| After one year follow up | ||
| Subjects at follow up | 1400 | 1752 |
| among which: smokers | 448 | 564 |
| Lost to follow up | ||
| in relation to company reorganisation | 243 (14%) | 284 (13%) |
| refusals | ||
| among non-smokers at baseline | 74 | 47 |
| among smokers at baseline | 56 | 27 |
| Smokers at follow up (smokers + refusals among smokers at baseline) | 504 (87%) | 591 (86%) |