Affective disorders-developments of ICD-11 in comparison with ICD-10.

Area of Science:

• Psychiatry
• Mental Health
• Clinical Psychology

Background:

• The 11th revision of the World Health Organization's International Statistical Classification of Diseases and Related Health Problems (ICD-11) introduces significant changes to affective disorder diagnostics.
• These updates align with the Diagnostic and Statistical Manual of Mental Disorders 5 (DSM-5) criteria, aiming for greater diagnostic consistency.

Purpose of the Study:

• To review and explain the structural and content adjustments in the ICD-11 diagnostic guidelines for affective disorders.
• To highlight key changes in the classification and diagnosis of depressive and bipolar disorders.

Main Methods:

• Review of the ICD-11 diagnostic guidelines for affective disorders.
• Comparative analysis of ICD-11 classifications against previous versions (ICD-10) and the DSM-5.

Main Results:

• ICD-11 classifies depressive symptoms into clusters, incorporating mood, cognitive, behavioral, and neurovegetative symptoms.
• New distinctions in depressive episode remission (partial vs. complete) and a 2-year criterion for persistent depressive disorder.
• Bipolar disorder is now classified into Type I and Type II, with manic episodes coded only within bipolar disorder contexts.

Conclusions:

• The ICD-11 provides a refined framework for diagnosing affective disorders, enhancing specificity and alignment with contemporary psychiatric nosology.
• Changes in classification, such as the categorization of dysthymia and cyclothymia, reflect an updated understanding of mood disorder spectrums.
• These revisions are expected to improve diagnostic accuracy and facilitate more consistent clinical practice and research in affective disorders.