Our 15.000 underage participants (at baseline) are an important part of the Lifelines cohort.
Children were recruited via their parents. Depending on their age, children participated in various measurements and questionnaires over time.

At baseline, children participated in the following measurements/questionnaires:

• Anthropometric measures (8-17 years) → 1A Visit 1
• Blood pressure (8-17 years) → 1A Visit 1
• 12-lead electrocardiogram (13-17 years) → 1A Visit 1
• Pulmonary function test (8-17 years) → 1A Visit 1
• Blood sample collection (8-17 years) → 1A Visit 2
• Urine sample collection (8-17 years) → 1A Visit 2
• 1A Birth questionnaire (0-17 years, filled in by the parents)
• 1A General questionnaire (4-17 years, filled in by the parents)
• 1A Behavior questionnaire (4-17 years, filled in by the parents)
• 1A Food questionnaire (8-12 years, filled in by the parents)
• 1A Youth questionnaire (13-17 years, self-report)

Age distribution for 1A Child participants:

Underage participants did not receive any follow-up questionnaires between assessments 1A and 2A, unless they turned 18 (n = ~780).

In assessment 2A, children participated in the following measurements/questionnaires:

• Anthropometric measures (8-17 years) → 2A Visit 1
• Blood pressure (8-17 years) → 2A Visit 1
• 12-lead electrocardiogram (13-17 years) → 2A Visit 1
• Jump test (8-17 years) → 2A Visit 1
• CogState (13-17 years) → 2A Visit 1
• Pulmonary function test (8-17 years) → 2A Visit 1
• Blood sample collection (8-17 years) → 2A Visit 2
• Urine sample collection (8-17 years) → 2A Visit 2
• 2A Child questionnaire (4-12 years, filled in by the parents)
• 2A Youth questionnaire (13-17 years, self-report)

Age distribution for 2A Child participants:

Various additional assessments include underage participants:

• DAG3
• UGLI
• NEXT
• QADH
• QBLU
• QDCD