Diagnostic Criteria and Applications of DSM-5

Core Functions and Diagnostic Approach

• The American Academy of Child and Adolescent Psychiatry revised the diagnostic term from "mental retardation" to "intellectual disability (intellectual developmental disorder)" to align with the World Health Organization's International Classification of Diseases (ICD-11), emphasizing a shift in classification and diagnostic criteria 1, 2.
• The DSM-5 emphasizes the assessment of both intellectual deficits and adaptive functioning deficits across multiple environments when diagnosing conditions like intellectual disability, focusing on four levels of severity based on adaptive functioning 3, 1, 2.
• The manual incorporates dimensional assessments to complement categorical diagnoses, combining the advantages of both approaches for more comprehensive clinical characterization, as noted by Dialogues in Clinical Neuroscience 4.

Clinical Applications and Implementation

• The American Journal of Psychiatry specifies that DSM-5 helps differentiate between primary psychiatric disorders and substance/medication-induced disorders by specifying diagnostic requirements for each, guiding treatment planning and prognosis 5.
• The Journal of the American Academy of Child and Adolescent Psychiatry facilitates the identification of co-occurring psychiatric disorders in populations with developmental disorders, such as intellectual disability, using standardized diagnostic criteria 6, 3.
• Clinicians use standardized assessment tools referenced in DSM-5, such as the Yale-Brown Obsessive Compulsive Scale (Y-BOCS), to allow for objective measurement of symptom severity and treatment monitoring, although this specific example is from Praxis Medical Insights, it is not the primary source, however, it is still a relevant guideline 7.