Characterizing autistic traits in treatment-seeking young adults with substance use disorders

Recent work highlights an increase in the overlap of autism spectrum disorder (ASD) and substance use disorder (SUD). Little is known about the presence of ASD symptoms in SUD-treatment-seeking populations.

The informant-rated Social Responsiveness Scale-2 (SRS-2) was completed at intake to an outpatient SUD clinic for youth aged 16-26 (N = 69). Comparisons were made between those with elevated SRS-2 scores on demographic, psychiatric, and substance use variables.

Parents of sixty-nine patients with SUD completed the SRS-2. Fourteen (20%) (average age 18.7 ± 2.5) had elevated SRS-2 Total T-scores (≥66) and 55 (average age 18.1 ± 2.8) had non-clinical SRS-2 Total T-scores. There were few differences between groups; however, those with elevated SRS-2 Total T-scores were more likely to have a stimulant use disorder (odds ratio [OR] = 7.59, 95% confidence interval [CI] = 0.77, 101.88; p = 0.05) or an opioid use disorder (OR = 5.02, 95% CI = 0.59, 43.27; p = 0.08) than patients with normal SRS-2 Total T-scores as well as alcohol use in the week prior to intake.

A significant proportion of treatment-seeking SUD outpatients suffer from clinically elevated autistic traits. These findings highlight the importance of assessing for autistic traits in SUD treatment settings yet additional research is needed to determine if these findings are specific to the presence of ASD or secondary to sequelae of specific SUD presentations.

This study is, to our knowledge, the first to have examined the prevalence, morbidity, or clinical characteristics, associated with ASD symptoms in a SUD-specific population.