Parental and child characteristics
Castor EDC
SECONDARY
One parent of the child completed the general sociodemographic questionnaire about age, sex, marital status (married/living together or divorced/separated/widowed), number of children living at home (1, 2, or 3 or more), educational level (low [primary education, lower vocational education, lower or middle general secondary education], intermediate [middle vocational education, higher secondary education, pre-university education], or high [higher vocational education, university]), and occupational status (paid employment or not) (of both self and that of partner). Clinical data of the children (age and sex) were prospectively collected by trained clinicians using a standardized electronic case report form (Castor EDC).