Table 1. Description of the two study populations.

	Diabetes study a	KiGGS b	p-value c
Number of participants	629	6813
Boys [%]	54.1	51.3	0.189
Age
Mean (SD) [years]	15.3 (1.7)	14.6 (2.0)	<0.001
11–13 years [%]	24.0	39.6	<0.001
14–17 years [%]	76.0	60.4
Socioeconomic status
Low [%]	17.9	27.4	<0.001
Intermediate [%]	48.2	47.2
High [%]	33.9	25.3
Migration background [%]	1.8	17.5	<0.001
Region of residence
West-Germany [%]	86.2	81.4	0.003
East-Germany [%]	13.8	18.6
Family structure
Biological parents [%]	79.2	74.6	0.070
Mother and partner/father and partner [%]	9.3	10.6
Single mother/father [%]	10.4	13.6
Other (relatives, foster parents, youth institutions) [%]	1.1	1.3
Weight status
Underweight [%]	3.3	7.5	<0.001
Normal weight [%]	80.7	74.8
Overweight (incl. adiposity) [%]	16.0	17.7

^aPercentages and means (SD).

^bWeighted percentages and weighted means (SD).

^cχ²-Test, t-Test.