Explanation of group no 1

number description
1 Background

List of questions of this group in the dataset
        Year of birth
        Month of birth
        Sex
        Work description as a background for social background
        Social background level
        Birthplace, county or country
        Nationality of the student, grouped
        Nationality of the father, grouped
        Nationality of the mother, grouped

Forms and questions in cohort 1977 having questions in this group
  Parent questionnaire in grade 6
  This group are not available in any other form for this cohort