Obsessive-compulsive and related disorders in international classification of Diseases-11 and its relation to international classification of Diseases-10 and diagnostic and statistical manual of mental Disorders-5

The World Health Organization is in the process of publishing the 11th edition of international Classification of Diseases and Related Health Problems (ICD-11). This article discusses the rationale behind the creation of the new “Obsessive-Compulsive and Related Disorders (OCRD)” section in the ICD-11 chapter on Mental and Behavioral Disorders and compares it with the ICD-10 and the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). The new section on OCRD was introduced in ICD-11 after a review of the relevant literature that has accumulated since the publication of ICD-10 in 1990. The proposed OCRD section includes obsessive-compulsive disorder (OCD), body dysmorphic disorder, olfactory reference disorder, hypochondriasis, hoarding disorder, trichotillomania, and skin-picking disorder. Tourette syndrome is also cross-referenced in OCRD. These disorders are grouped together on the basis of considerations of diagnostic validity and clinical utility. The ICD-11 OCRD section is somewhat similar to the DSM-5 OCRD section, reflecting efforts to harmonize the two major classificatory systems. Clustering together disorders related to OCD may encourage clinicians in diverse settings worldwide to identify these disorders early and offer timely interventions.

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