The study group
The study group was employees, 28 work teams, where a) seven supervisors (CHIEF), b) eight workplace champions (WC) and c) seven supervisors and nine workplace champions (CHIEF + WC) participated in the educational programme. The work teams were divided into four mixed groups depending on their main occupation: school, cleaning, home care and administration. The participants in the control group (CONTROL) also came from these areas (Table I).
In the intervention group CHIEF, 67% were non-smokers while the other groups had around 55% non-smokers