Prevalence of Substance Use Disorder Among Autistic Youth With and Without Co-Occurring Mental Health Conditions and a History of Trauma.
Autistic youth have lower base rates of substance use disorder, but co-occurring mental health or trauma history raises their risk more than it does for other teens.
01Research in Context
What this study did
Whaling et al. (2025) compared substance use disorder rates in autistic and non-autistic youth. They also looked at how mental health conditions and past trauma changed those rates.
The team used health records from a large group of young people. They counted who had autism, who had substance use disorder, and who had other mental health diagnoses or a history of maltreatment.
What they found
Autistic youth had lower overall rates of substance use disorder: 1.7% versus 3.8% in non-autistic youth.
But when autistic youth also had mental health conditions or trauma history, their risk jumped higher than it did for non-autistic youth with the same problems.
How this fits with other research
Ressel et al. (2020) pooled 26 studies and saw substance abuse rates in autism range from 1.3% to 36%. The new 1.7% figure sits at the low end, showing the wide range came from small or different samples.
Bouck et al. (2016) warned that autistic adults with SUD need tailored care. The 2025 youth data back this up: when autism plus mental health or trauma is present, risk spikes, so standard drug counseling may miss autism-specific needs.
Brenner et al. (2018) found abused autistic kids showed more irritability and intrusive thoughts. The 2025 study adds a longer-term view: those same trauma-exposed kids may also face higher odds of later substance use.
Why it matters
Lower overall SUD numbers can fool clinicians into skipping drug screens for autistic clients. Don't skip them. When you see anxiety, ADHD, depression, or any maltreatment history, treat substance use risk as you would for any high-risk teen, then add autism supports like clear rules, visual cues, and sensory-friendly spaces.
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02At a glance
03Original abstract
There is limited research on the prevalence of substance use disorders (SUDs) in autistic youth. Additionally, while mental health conditions and history of trauma have been associated with a higher prevalence of SUD in non-autistic youth, the research in autistic youth is scarce. Therefore, the purpose of this study was to examine the prevalence of SUDs in autistic youth compared to non-autistic youth with co-occurring mental health conditions and adverse childhood experiences. Data from 22,828 autistic youth and 601,348 non-autistic youth were drawn from the Child and Caregiver Linked Utilization and Outcomes Database (CCOULD). SUDs were identified using categorized ICD-10 diagnostic codes, and mental health comorbidities included six conditions (ADHD, anxiety, depression, bipolar disorder, schizophrenia/psychotic disorders, trauma/stress-related disorders), substantiated maltreatment allegations, and placement history. Overall prevalence of SUD was lower among autistic youth (1.7%) compared to non-autistic youth (3.8%, p < 0.001). Both mental health comorbidities and maltreatment allegations were significantly associated with having a SUD, regardless of autism diagnosis. Placement in out-of-home care significantly reduced the likelihood of SUD among non-autistic youth (UOR = 0.83, 95% CI: 0.80-0.87) but more than doubled the odds among autistic youth (UOR = 2.36, 95% CI: 1.88-2.97). While prevalence rates of SUDs are lower in autistic youth compared to non-autistic youth, the presence of co-occurring mental health conditions and adverse childhood experiences may increase SUD rates to a greater extent in autistic youth. Future research should further investigate the complex relationships among SUDs, adverse childhood experiences, and mental health conditions in autistic youth.
Autism research : official journal of the International Society for Autism Research, 2025 · doi:10.1002/aur.70081