[Pilot study of The Child and Adolescent Health Survey: methodological aspects and procedure].

In the pilot study of the National Health Survey for Children and Adolescents which has been conducted under the responsibility of the Robert Koch Institute from March 12th 2001 to March 15th 2002, 1,630 children and adolescents from 0 to 17 years as well as their parents have been included. Methodological issues have been very prominent. Questionnaires regarding properties, indicators (for example for psychic well-being) were developed and evaluated, different methods of access to the study participants as well as methods to increase the motivation to participate in the study were tested, and the property for generalisation or validity of the obtained information was investigated. The conduct of the pilot study resulted in a number of experiences and findings that will contribute to an optimised approach in the main course of the survey.