Table 1 Data included in the study categorised by the likelihood of collection during routine well-child assessments

Gender (PCH)

Male vs. female

Age (PCH)

8-10, 11-12 years

Ethnic background (PCH)

Dutch, Moroccan/Turkish, Surinamese/Antillean, other non-European

Number of siblings (PCH)

≥ 2 vs. < 2

Age of father, mother at birth of child (PCH)

≤ 26 years (young) vs. higher age

Educational level of father and mother (PCH)

≤ 12 years (low) vs. more (high/intermediate)

Urbanization (PCH)

City > 250,000 inhabitants (urban) vs. smaller

At least one parent having a paid job (PCH)

Yes vs. no

Family composition (PCH)

One parent vs. two parents

Chronic disease of child (PCH)

Yes vs. no

Parental concerns (on parenting in general; child development, behaviour, emotions, social functioning, and/or academic performance) (P)

≥ 1 vs. none

Life event in the past 12 months (moved to a new house, new sibling, parental divorce, parent unemployed, death or severe disease of a household member, severe disease of the child) (P)

≥ 1 vs. none

Under treatment for psychosocial problems (PCH)

Yes vs. no

Medical treatment for injuries in the past 12 months (C)

≥ 2 times vs. < 2 times

Likely available

School performance compared to classmates (C)

Poorer vs. equal to/better

Feeling bored at school (C)

(Very) often vs. sometimes/never

Appreciation of life (C)

< 7 vs. ≥ 7 on a 10-point scale (1 = negative,10 = highly positive)

Having sufficient friends (C)

Yes vs. no

Appreciation of school (C)

Dislike (very) much vs. like (very) much

Possibly available

Whether substances were ever used (alcohol, cigarettes) (C)

Yes vs. no