Definition and Diagnosis
Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by persistent differences in social communication and interaction, alongside restricted, repetitive patterns of behavior, interests, or activities, with symptoms present from early childhood.
Epidemiology
Current estimates suggest ASD affects roughly 1 in 36 children, with diagnosis increasingly recognized across the lifespan, including in adults who were not identified in childhood. It is diagnosed more frequently in boys, though under-recognition in girls and women is well documented.
Risk Factors
ASD has a strong genetic component, with additional contributions from certain prenatal and perinatal factors. Having a sibling with ASD or certain genetic syndromes increases likelihood.
Symptoms and Subtypes
Presentations vary widely and can include differences in eye contact and reciprocal conversation, strong preference for routine, intense or focused interests, and sensory sensitivities to sound, light, or texture. Support needs range considerably across individuals.
Diagnosis
Assessment involves developmental history, direct observation, and standardized tools, evaluated against DSM-5-TR criteria for social communication differences and restricted/repetitive behaviors. A multidisciplinary approach, often including speech-language and occupational therapy input, supports comprehensive assessment.
Treatment
Support is individualized and may include speech and language therapy, occupational therapy for sensory needs, social skills support, and educational accommodations. The aim of treatment planning is to build on individual strengths while addressing specific areas of need, rather than pursuing a one-size-fits-all approach.
Prognosis
Outcomes vary widely depending on individual strengths, co-occurring conditions, and access to support, with many individuals living full and independent lives with appropriate accommodations. Early, individualized support is associated with improved developmental and functional outcomes.
Reference
American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).