A lightly modified version of the basic documentation of the Child and Adolescent Psychiatric Associations was introduced in three different clinics. Relevant items were analysed for about 5300 patients. The data of the 3 clinics were compared. There was a fair amount of agreement in the age structure and the distribution of the diagnoses between the clinics. A regular and detailed comparative analysis of the data will be developed as a measure of quality. The results of these analyses will be discussed in the 3 clinics and implemented in the daily routines.