Interview guide
| Topic | Question |
| Opening question | What kind of work do you do? |
| Previous quit attempts | Have you ever tried to quit smoking before the smoking cessation training programme? |
| Choice to participate in the group training programme | How did you learn about the smoking cessation training programme? |
| Experiences with the group training programme | If you look back at the smoking cessation training programme, how did you experience it? |
| Quitting smoking in the working environment | What do you think about the fact that the training programme was organised at the workplace? |
| Quitting smoking successful or not | How did your attempt to quit smoking go? |
| Success factors in quitting | What helped you to stay abstinent from smoking? |
| The stimulating effect of the reward | What did you think about the reward? |
| Final question | Would you like to add something to what we have discussed? |