Obsessive-compulsive disorders are very damaging illnesses that can already manifest in childhood and adolescence. With an average prevalence from 1 - 3%, they are one of the most frequently diagnosed psychiatric illness in these age groups. With the further use of data, the treatment success can be significantly improved; causal variables/predictors can be recognized, understood and taken carefully into account. The anticipated incremental knowledge will ultimately help children and young people with obsessive-compulsive disorders to receive faster and more effective treatment.

Inclusion Criteria:

• Children and young people from 8-18 years of age who fulfill the international classification of diseases tenth edition (ICD-10) , obsessive-compulsive disorder handled in our clinic.
• Good German language speaking skills
• IQ > 75
• All study participants or their legal representative have given written permission for their experiences to be documented in the study.

Exclusion Criteria:

• Schizophrenia-related disorders (psychoses)
• Missing data
• Data sets without confirmed diagnosis
• Purely consultaive patient interview (no therapy intervention prescribed)

The sample consist of pupils with obsessive-compulsive disorder 4 to 18 years