Fig. 4

Recruitment of doctors in 4 municipalities. In Helsinki all school doctors who gave consent were chosen. The school doctors chose 2 different schools from different socioeconomic areas of Helsinki if possible. In Tampere, Kirkkonummi and Kerava the chief physician chose school doctors who had different education and experience of working as a school doctor and schools from different socioeconomic areas of the municipality. The school nurses and teachers were chosen according to the school doctors’ schools. In Helsinki 2 nurses refused to participate and the doctor chose another school instead