Type of parents: natural parents, step-parents, adoptive parents, guardian / reason for absence of natural parent / which institutions are responsible for placing the child in a home / legal measures for child protection / symptoms and disorders somatic, psychosomatic, emotional, social / problems of education / marriage / position in parental family / family problems in general / work of parents / psycho-social disorders of parents / alcohol and drugs / living conditions / relations with step-parent or guardian / schoolwork / discussions and reports on youth by the institutions concerned. Background variables: basic characteristics/ residence/ household characteristics/ characteristics of parental family/household/ occupation/employment/ education/ social class