The current revision of ICD-10 also involves the group of schizophrenia and other non-organic psychotic disorders.

To describe the current status of the development of the revised diagnostic criteria by the working group on psychotic disorders for ICD-11.

This presentation will describe the development of the work group on psychotic disorders and its current activities.

Report of the current activities of the WHO ICD-11 working group on psychotic disorders.

The workgroup was formed in 2010 and had its first in person meeting in January 2010. Several conceptual issues were evident and are currently being reviewed, including the use of dimensional assessments, the role of functional outcome assessments, the definition of course and severity specifiers, and the reorganisation of the psychotic disorders in the chapter. Also, the group has started to review the specific diagnostic criteria for schizophrenia, acute and transient psychotic disorders, schizoaffective disorder, delusional and brief psychotic disorders, and schizotypal disorders. While the revision proposals should be mainly evidence-based, initial review results indicate that in many cases expert consensus decisions will be necessary due to a lack of studies.

The workgroup on the classification of psychotic disorders is currenly reviewing the scientific evidence for specific diagnostic criteria and more general issues pertaining to the classification of psychotic disorders. Both expert consensus and evidence-guided criteriology will be necessary and the lack of suitable studies in some areas of psychosis research may prompt research suggestions for the upcoming ICD-11 field trials.