[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"condition-autism":3},{"id":4,"title":5,"abbr":6,"assessments":7,"bgClass":36,"body":37,"category":6,"comorbidities":44,"description":74,"dsmCriteria":75,"etiology":108,"extension":144,"heroSubtitle":145,"heroTitle":146,"icdCode":147,"icon":148,"iconClass":149,"labelClass":6,"lastReviewed":6,"meta":150,"name":173,"navigation":174,"onsetAge":175,"path":176,"prevalence":177,"ratio":178,"responseRate":179,"seo":180,"slug":181,"sources":182,"stem":203,"takeaways":6,"tools":6,"treatments":204,"__hash__":242},"conditions\u002Fconditions\u002Fautism.md","ASD Clinical Guide: ADOS-2, M-CHAT and DSM-5-TR Criteria",null,[8,15,22,29],{"name":9,"fullName":10,"description":11,"scoring":12,"timeframe":13,"icon":14},"ADOS-2","Autism Diagnostic Observation Schedule, Second Edition","Criterion-standard semi-structured assessment using standardized activities to observe social-communication and restricted\u002Frepetitive behaviors.","Comparison scores (1-10); scores ≥8 suggest autism, 4-7 autism spectrum; module selected by age\u002Flanguage level","40-60 minutes","ph:eye",{"name":16,"fullName":17,"description":18,"scoring":19,"timeframe":20,"icon":21},"ADI-R","Autism Diagnostic Interview-Revised","Detailed parent\u002Fcaregiver interview covering developmental history and current behaviors; complements ADOS-2.","Algorithm scores for social interaction, communication, and restricted\u002Frepetitive behaviors","90-150 minutes","ph:user-circle",{"name":23,"fullName":24,"description":25,"scoring":26,"timeframe":27,"icon":28},"M-CHAT-R\u002FF","Modified Checklist for Autism in Toddlers, Revised with Follow-Up","Parent questionnaire for screening toddlers (16-30 months); includes follow-up interview to reduce false positives.","Low, medium, high risk based on critical items; high risk warrants immediate diagnostic evaluation","5 minutes (screener), 5-10 minutes (follow-up)","ph:clipboard-text",{"name":30,"fullName":31,"description":32,"scoring":33,"timeframe":34,"icon":35},"SRS-2","Social Responsiveness Scale, Second Edition","Quantitative measure of autistic traits across social awareness, cognition, communication, motivation, and restricted\u002Frepetitive behaviors.","T-scores: ≥76 severe, 66-75 moderate, 60-65 mild deficits in social interaction","15-20 minutes","ph:users","bg-purple-500\u002F10",{"type":38,"value":39,"toc":40},"minimark",[],{"title":41,"searchDepth":42,"depth":42,"links":43},"",2,[],[45,50,55,60,65,69],{"condition":46,"prevalence":47,"note":48,"icon":49},"Intellectual Disability","30-50%","Ranges from mild to profound; significantly impacts adaptive functioning and treatment planning","ph:brain",{"condition":51,"prevalence":52,"note":53,"icon":54},"ADHD","40-70%","Inattention, hyperactivity, impulsivity frequently co-occur; DSM-5-TR now allows dual diagnosis","ph:lightning",{"condition":56,"prevalence":57,"note":58,"icon":59},"Anxiety Disorders","40-50%","Social anxiety, specific phobias, OCD common; often related to sensory sensitivities and rigid thinking","ph:warning-circle",{"condition":61,"prevalence":62,"note":63,"icon":64},"Epilepsy\u002FSeizure Disorders","20-30%","Higher in those with intellectual disability; requires neurological monitoring","ph:pulse",{"condition":66,"prevalence":52,"note":67,"icon":68},"Gastrointestinal Issues","Chronic constipation, diarrhea, abdominal pain; may affect behavior and communication","ph:circle-wavy",{"condition":70,"prevalence":71,"note":72,"icon":73},"Sleep Disorders","50-80%","Insomnia, irregular sleep-wake patterns; impacts daytime functioning and family wellbeing","ph:moon","Clinical guide to Autism Spectrum Disorder: assessment protocols (ADOS-2, ADI-R, M-CHAT), diagnostic criteria, and evidence-based interventions including ABA.",[76,83,92,99],{"title":77,"subtitle":78,"icon":35,"items":79},"Criterion A: Social Communication & Interaction Deficits","Persistent deficits across multiple contexts. All three required:",[80,81,82],"Social-Emotional Reciprocity (Abnormal social approach, reduced sharing of interests\u002Femotions, failure to initiate\u002Frespond to social interactions)","Nonverbal Communication (Poorly integrated verbal\u002Fnonverbal communication, abnormal eye contact and body language, deficits in understanding\u002Fusing gestures)","Relationships (Difficulty adjusting behavior to social contexts, challenges in sharing imaginative play, difficulty making friends, absence of interest in peers)",{"title":84,"subtitle":85,"icon":86,"items":87},"Criterion B: Restricted, Repetitive Behaviors","2+ required:","ph:arrows-clockwise",[88,89,90,91],"Stereotyped\u002FRepetitive Motor Movements or Speech (Hand flapping, rocking, echolalia, idiosyncratic phrases)","Insistence on Sameness (Inflexible routines, ritualized patterns, extreme distress at changes)","Highly Restricted, Fixated Interests (Abnormal in intensity or focus)","Atypical Sensory Responses (Hyper\u002Fhypo-reactivity, unusual sensory interests, adverse response to textures\u002Fsounds)",{"title":93,"subtitle":94,"icon":95,"items":96},"Criterion C & D: Development & Function","Onset and impact requirements:","ph:clock",[97,98],"Criterion C: Symptoms must be present in early childhood","Criterion D: Symptoms cause clinically significant impairment in social, occupational, or other areas",{"title":100,"subtitle":101,"icon":102,"items":103},"Specifiers","Additional diagnostic information:","ph:warning",[104,105,106,107],"With or without intellectual impairment","With or without language impairment","Associated with known genetic\u002Fmedical condition","Level of support required (Level 1, 2, or 3)",[109,117,126,135],{"category":110,"factors":111,"icon":49,"color":116},"Neurobiological",[112,113,114,115],"Atypical brain connectivity (reduced long-range, increased local)","Brain volume changes in early childhood","Abnormalities in temporal cortex, amygdala, cerebellum","Altered excitatory\u002Finhibitory (E\u002FI) balance","primary",{"category":118,"factors":119,"icon":124,"color":125},"Genetic",[120,121,122,123],"Heritability: 70-90%","Polygenic architecture: 100+ genes","De novo mutations (SHANK3, NLGN, NRXN)","Copy number variants (16p11.2 deletion, 15q duplication)","ph:dna","secondary",{"category":127,"factors":128,"icon":133,"color":134},"Environmental",[129,130,131,132],"Advanced parental age","Prenatal exposure to valproate","Maternal immune activation","Extreme prematurity and low birth weight","ph:globe","accent",{"category":136,"factors":137,"icon":142,"color":143},"Neuropsychological",[138,139,140,141],"Theory of Mind deficits","Weak central coherence","Executive function impairments","Atypical sensory processing","ph:lightbulb","info","md","A neurodevelopmental condition characterized by persistent differences in social communication, restricted interests, repetitive behaviors, and atypical sensory processing. Presents across a spectrum of support needs.","Autism \u003Cbr \u002F> \u003Cspan class='text-gradient-flow'>Spectrum Disorder\u003C\u002Fspan>","F84.0","ph:puzzle-piece","text-purple-500",{"faqs":151},[152,155,158,161,164,167,170],{"question":153,"answer":154},"What is Autism Spectrum Disorder?","Autism Spectrum Disorder (ASD) is a neurodevelopmental condition defined in DSM-5-TR (ICD-10 code F84.0) by persistent differences in social communication and interaction across multiple contexts, accompanied by restricted, repetitive patterns of behavior, interests, or activities. Atypical sensory processing is a recognized feature. Symptoms must be present in early developmental period and produce clinically significant impairment. Severity is rated across three levels reflecting the degree of support needed.",{"question":156,"answer":157},"What are the symptoms of autism?","Core symptoms span two DSM-5-TR criteria domains. Social communication differences include challenges with social-emotional reciprocity, nonverbal communication (eye contact, gestures, facial expressions), and developing or maintaining relationships. Restricted, repetitive behaviors include stereotyped motor movements (hand flapping, rocking), insistence on sameness, highly restricted fixated interests, and atypical sensory responses (hypersensitivity or hyposensitivity to sounds, textures, lights). Many autistic individuals also have differences in language development, cognitive profiles, and co-occurring conditions like ADHD or anxiety.",{"question":159,"answer":160},"How is autism diagnosed?","Diagnosis is made by a trained clinician (developmental pediatrician, child psychiatrist, neuropsychologist, or psychologist) using DSM-5-TR criteria informed by structured assessment. The ADOS-2 (Autism Diagnostic Observation Schedule) is the criterion-standard observational measure; the ADI-R (Autism Diagnostic Interview-Revised) is the parent interview companion. M-CHAT-R\u002FF is the standard early childhood screener (16 to 30 months). Diagnostic workup typically includes developmental history, direct observation, cognitive and language assessment, and ruling out hearing impairment or other conditions.",{"question":162,"answer":163},"What causes autism?","Autism has a strong genetic basis, with heritability estimates of 80 to 90 percent. More than 1,000 genes are implicated, including SHANK3, MECP2, and FMR1, with both common variants and rare de novo mutations contributing. Neurobiologically, autism reflects atypical neural connectivity, with both increased local connectivity and reduced long-range connectivity in cortical networks. Environmental contributors include advanced parental age, prenatal valproate exposure, and certain pregnancy and birth complications. Vaccines do not cause autism; this has been definitively established by large-scale studies.",{"question":165,"answer":166},"How is autism treated?","Autism is not treated as an illness to cure but supported through evidence-based interventions tailored to the individual's profile. Early intensive behavioral interventions like the Early Start Denver Model (ESDM) and naturalistic developmental behavioral interventions show strong evidence for young children. Speech and language therapy, occupational therapy for sensory processing, and social skills programs support functional outcomes. CBT adapted for autism helps with co-occurring anxiety and depression. Medications target specific symptoms or comorbidities (irritability, ADHD, anxiety) but do not treat core autism features.",{"question":168,"answer":169},"Can autism be cured?","Autism is a lifelong neurodevelopmental difference rather than a condition to cure. The contemporary clinical and neurodiversity-informed view focuses on supporting autistic individuals to thrive on their own terms while addressing co-occurring conditions and functional challenges that cause distress or impairment. Outcomes vary widely: some individuals live independently with full employment, others need lifelong support. Early intervention, family support, accommodations in education and employment, and access to mental health care for comorbidities produce the strongest functional outcomes.",{"question":171,"answer":172},"What is the difference between autism and Asperger's?","Asperger's Syndrome is no longer a separate diagnosis. The DSM-5-TR (2013) consolidated Asperger's, autistic disorder, PDD-NOS, and childhood disintegrative disorder into a single Autism Spectrum Disorder diagnosis with severity levels. The change reflected research showing the prior subtypes were not reliably distinguishable. Individuals previously diagnosed with Asperger's typically meet criteria for ASD without accompanying intellectual or language impairment in current terminology. ICD-10 code F84.0 covers all current ASD diagnoses; the older F84.5 (Asperger's) is retained primarily for legacy records.","Autism Spectrum Disorder",true,"~18mo","\u002Fconditions\u002Fautism","1 in 36","4:1","70-90%",{"title":5,"description":74},"autism",[183,186,190,194,197,200],{"title":184,"citation":185,"icon":14},"ADOS-2 Validation","Lord C, Rutter M, et al. Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) Manual. Western Psychological Services. 2012.",{"title":187,"citation":188,"icon":189},"DSM-5-TR Criteria","American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). 2022.","ph:book-open",{"title":191,"citation":192,"icon":193},"Early Intensive Behavioral Intervention","Dawson G, Rogers S, et al. Randomized, controlled trial of an intervention for toddlers with autism: the Early Start Denver Model. Pediatrics. 2010;125(1):e17-23.","ph:chart-line-up",{"title":195,"citation":196,"icon":124},"Genetic Architecture of Autism","Grove J, Ripke S, et al. Identification of common genetic risk variants for autism spectrum disorder. Nat Genet. 2019;51(3):431-444.",{"title":198,"citation":199,"icon":49},"Neurobiology of Autism","Geschwind DH, Levitt P. Autism spectrum disorders: developmental disconnection syndromes. Curr Opin Neurobiol. 2007;17(1):103-111.",{"title":201,"citation":202,"icon":28},"M-CHAT-R\u002FF Screening Tool","Robins DL, Casagrande K, et al. Validation of the Modified Checklist for Autism in Toddlers, Revised with Follow-up (M-CHAT-R\u002FF). Pediatrics. 2014;133(1):37-45.","conditions\u002Fautism",[205,211,217,223,230,236],{"name":206,"type":207,"description":208,"efficacy":209,"notes":210,"icon":193},"Applied Behavior Analysis (ABA)","First-line","Intensive behavioral intervention using reinforcement principles to teach communication, social, adaptive, and academic skills.","Strong evidence for skill acquisition; early intensive (25-40 hrs\u002Fweek) shows IQ and adaptive gains","Naturalistic developmental approaches (e.g., PRT, ESDM) emphasize child-led play",{"name":212,"type":207,"description":213,"efficacy":214,"notes":215,"icon":216},"Speech-Language Therapy","Targets expressive\u002Freceptive language, pragmatic communication, and use of augmentative\u002Falternative communication (AAC) if nonverbal.","Essential for communication development; early intervention critical for language outcomes","Coordinate with schools; may use visual supports, PECS, or speech-generating devices","ph:chats",{"name":218,"type":207,"description":219,"efficacy":220,"notes":221,"icon":222},"Occupational Therapy","Addresses sensory processing difficulties, fine\u002Fgross motor skills, self-care, and adaptive functioning.","Improves daily living skills and reduces sensory-related distress","Sensory integration therapy controversial; focus on functional outcomes","ph:hand",{"name":224,"type":225,"description":226,"efficacy":227,"notes":228,"icon":229},"Social Skills Training","Adjunct","Group or individual instruction in perspective-taking, conversation skills, emotional recognition, and friendship development.","Moderate evidence for skill acquisition; generalization remains challenge","Structured programs (e.g., PEERS, Secret Agent Society) show promise","ph:users-three",{"name":231,"type":225,"description":232,"efficacy":233,"notes":234,"icon":235},"Medication (Targeted Symptoms)","Risperidone\u002Faripiprazole (FDA-approved for irritability\u002Faggression), SSRIs (anxiety\u002FOCD), stimulants (ADHD), melatonin (sleep).","No medication treats core autism symptoms; targets comorbid conditions and interfering behaviors","Careful monitoring; autistic individuals may have atypical medication responses","ph:pill",{"name":237,"type":238,"description":239,"efficacy":240,"notes":241,"icon":35},"Parent\u002FCaregiver Training","Essential","Teaches families to implement ABA principles, use visual supports, manage challenging behaviors, and promote generalization.","Critical for treatment success; reduces parent stress and improves child outcomes","Programs like Project ImPACT show strong evidence for parent-mediated intervention","WsfYR6x-WcIMsYSGf_pUItIMWF_uvVHs4SIW_5QYxgc"]