Table 1 Characteristics of study participants
From: Relative validation of the KiGGS Food Frequency Questionnaire among adolescents in Germany
| Â | n | % |
|---|---|---|
Sex | ||
   Male | 582 | 48.0 |
   Female | 631 | 52.0 |
Age group | ||
   12-13 years | 416 | 34.3 |
   14-15 years | 427 | 35.2 |
   16-17 years | 370 | 30.5 |
Body weight (BMIa) | ||
   Under-/normal weight (≤ P90) | 1005 | 82.9 |
   Overweight (>P97) | 201 | 16.6 |
   Missing | 7 | 0.6 |
Socio-economic statusb | ||
   Low | 249 | 20.5 |
   Medium | 617 | 50.9 |
   High | 331 | 27.3 |
   Missing | 16 | 1.3 |