In an epidemiological multi-centre study, parents filled in the Rutter Pare
nt Questionnaire (RA2) and teachers filled in the Rutter Teacher Questionna
ire (RB2) for almost 6000 children. The children filled in the Children's D
epression Inventory (CDI). The subjects well represented the entire populat
ion of 8-9-year-old children in Finland. The material and design of the stu
dy as well as the basic demographic characteristics are presented.