*3.1. Sample Description*

Key characteristics of the overweight and underweight subsamples in reference to adolescents with normal weight are provided in Table 1. Compared to the overweight and normal weight samples, there were more females in the underweight group. The percentage of adolescents with migration background was highest among overweight adolescents. Moreover, the percentage of adolescents with parents where both are employed was lowest in the overweight subsample. Compared to the normal weight reference group, the percentage of adolescents with any diagnosed psychiatric disorder was elevated in the overweight and underweight subsamples. The mean BMI of the overweight group was 27.00 (1.83 standard deviations above the BMI expected according to sex and age). The mean BMI of the underweight group was 15.67 (1.92 standard deviations below the BMI expected according to sex and age).


**Table 1.** Sample description.

<sup>1</sup> Either adolescent or one parent born in a country other than Austria; <sup>2</sup> An urban region is defined as living in a city with >10.000 inhabitants; <sup>3</sup> SDS = Standard Deviation Score.
