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PDD-NOS was one of four disorders collapsed into the diagnosis of autism spectrum disorder in the DSM-5, [3] and also was one of the five disorders classified as a pervasive developmental disorder (PDD) in the DSM-IV. [4] The ICD-10 equivalents also became part of its definition of autism spectrum disorder, as of the ICD-11.
The pervasive developmental disorders were: [4] Pervasive developmental disorder not otherwise specified (PDD-NOS), which includes atypical autism, and is the most common (47% of autism diagnoses); [10] Typical autism, the best-known; Asperger syndrome (9% of autism diagnoses); Rett syndrome; and; Childhood disintegrative disorder (CDD).
Generally, diseases outlined within the ICD-10 codes F84 within Chapter V: Mental and behavioural disorders should be included in this category. The main article for this category is Pervasive developmental disorders .
In May 2013, the DSM-5 was released, updating the classification for pervasive developmental disorders. The grouping of disorders, including PDD-NOS, autism, Asperger syndrome, Rett syndrome, and CDD, has been removed and replaced with the general term of Autism Spectrum Disorder. [94]
In July 2003, Newson published in Archives of Disease in Childhood for PDA to be recognized as a separate syndrome within the pervasive developmental disorders. [36] In 2020, an incorporated association was established in Australia. Pathological Demand Avoidance Australia, Inc. became a registered charity early 2021. [37]
Before the DSM-5 (2013) and ICD-11 CDDR (2024) [45] diagnostic manuals were adopted, ASD was found under the diagnostic category pervasive developmental disorder. The previous system relied on a set of closely related and overlapping diagnoses such as Asperger syndrome and the syndrome formerly known as Kanner syndrome.
The categorizations and the diagnostic criteria were largely unchanged. No new disorders or conditions were introduced, although a small number of subtypes were added and removed. ICD-9-CM codes that were changed since the release of IV were updated. [4] The DSM-IV and the DSM-IV-TR both contain a total of 297 mental disorders. [5]
Personality development disorder is not recognized as a mental disorder in any of the medical manuals, such as the ICD-10 [1] or the DSM-IV, [2] nor the more recent DSM-5. [3] DSM-IV allows the diagnosis of personality disorders in children and adolescents only as an exception. This diagnosis is currently proposed by a few authors in Germany. [4]