Table 1 Data Collection

Anthropometry

Name, date of birth, sex, type of school, medication, diseases, height, weight, waist and upper arm circumferences, skinfold thickness

Physiological measurements

Blood pressure, retinal vascular caliber, arterial stiffness

Blood samples

Triglyzerides, HDL- and LDL-cholesterol, insulin, fasting glucose, adiponectin, IL-6, hsCRP, testosteron, estrogen

Physical fitness

Six-item test battery

Physical activity

Self reported activity level in school and at home

Eating patterns

Food frequency questionnaire

Substance abuse

Smoking and consumption of alcohol

Life quality

KINDL-R-Questionnaire

Sedentary behaviour

Questionnaire concerning sedentary time (school, homework, media use)

Socio-economic index

Questionnaire concerning school level parents, native country of the parents and child, nationality children and parents, first language child

School Level Data

Questionnaire

Compliance to the intervention programme, school-specific needs, health-related activities in school (only in intervention schools)