Smoking prevalence in both groups after one year follow up
| Strategies | A | B | p |
| Smoking prevalence | |||
| Inclusion (baseline) | 504/1530 (32.9%) | 591/1826 (32.4%) | |
| One year (follow up)5-150 | 471/1530 (30.8%) | 524/1826 (28.7%) | |
| Difference baseline follow up | 2.1% | 3.7% | |
| p | 0.01 | 0.0001 | |
| Smokers at one year | |||
| Among non-smokers at inclusion | 35/1026 (3.4%) | 42/1235 (3.4%) | 0.98 |
| Non-smokers at one year | |||
| Among smokers at inclusion | 68/504 (13.5%) | 109/591 (18.4%) | 0.03† |
| Length of cessation | |||
| Smokers | 436 (86.5%) | 482 (81.6%) | |
| Cessation <6 months or undetermined | 45 (8.9%) | 73 (12.3%) | |
| Cessation ⩾6 months | 23 (4.6%) | 36 (6.1%) | 0.26‡ |
↵5-150 Considering all non-respondent (smokers and non-smokers at baseline) as smokers at follow up, prevalence of smoking would be 545/1530 (35.6%) in group A and 571/1826 (31.3%) in group B. †Taking into an account the randomisation by cluster: non-parametric Mann-Whitney test: p=0.01. ‡Grouping smokers and cessation <6 months.