Sample characteristics
chronic illness
CHRONIC ILLNESS
In the respective analyses, 5,160 children and adolescents each in IG and CG can be included for the U10, 5,861 each for the U11 and 1,808 each for the J2. Due to the matching, there are no differences with regard to age, gender, federal state or the presence of a chronic illness between IG and CG. The U10 sample has an average age of 7.7 years (SD: 0.5), the U11 of 10.0 years (SD: 0.7) and the J2 of 16.6 years (SD: 0.5). In all groups, the proportion of females is higher. 26.0% of the U10 sample, 29.8% of the U11 sample and 47.2% of the J2 sample have a chronic illness. Concerning the other determinants examined, i.e. those that are not matching criteria, there are differences between IG and CG. In all groups, the directly insured person (usually father or mother) in IG is more likely to have a higher level of school-leaving education and occupational education, and a higher income and is less likely to be unemployed compared to CG. The children and adolescents of IG live more often in urban regions and less often in rural regions. In terms of nationality, the proportion of children and adolescents with a nationality other than German is lower in IG for the U10 and the U11, while it is reversed with respect to the J2. The characteristics of the three samples stratified according to the different parameters as well as the significance levels are shown in Table 
Sample characteristics



Completedvocational training


