Several changes to the classification of schizophrenia and other psychotic disorders have been made to increase the reliability, clinical use and validity of the diagnostic classification which are considered here. A diagnosis of schizoaffective disorder would only be made in ICD-11 when the definitional requirement of schizophrenia is met concurrently with mood symptoms that meet the definitional requirements of a moderate or severe depressive episode, a manic episode, or a mixed episode. This requirement is more restrictive compared to ICD-10, which just required the presence of symptoms of schizophrenia and mood disorder. The total duration requirement would be 4 weeks. A cross-sectional approach was maintained in the ICD-11 for schizoaffective disorders as there is no evidence on how a longitudinal “lifetime” criterion impacts cross-sectional inter-rater reliability, and the reliability of lifetime symptoms’ report by patients and retrospective assessment by clinicians remains unknown.

No significant relationships.