Individuals with co-morbid OCD and ASD were more likely to have comorbid ADHD and tic disorders as well. 

Xavier University

Studies have found that 8-25% of individuals with OCD also have autism spectrum disorder. Furthermore, individuals with OCD are four times as likely to be diagnosed with autism spectrum disorder later on.

OCD and Autism Spectrum Disorder Co-morbidity

Hojgaard, D.R.M.A, Arildskov, T.W., Skarphedinsson, G., Hybel, K.A., Ivarsson, T., Weidle, B., Melin, K., Torp, N.C., & Thomsen. (2023). Do autistic traits predict outcome of cognitive behavioral therapy in pediatric obsessive compulsive disorder?. Research on Child and Adolescent Psychotherapy, 51. https://doi.org/10.1007/s10802-023-01078-5.

Do Autistic Traits Predict Outcome of Cognitive Behavioral Therapy in Pediatric Obsessive Compulsive Disorder?

OCD and Autism Spectrum Disorder References 

Individuals with comorbid OCD and ASD experience more of the following symptoms: 
- Hoarding (studies have mixed findings)
- Symmetry 
- Repeating

OCD and Autism Spectrum Disorder Co-Morbidity: Different Symptoms

Studies have had mixed findings on whether there are gender differences in the rates of OCD and ASD co-morbidity. Some studies found that amongst children and adolescents, there is no gender difference in the rates of OCD and ASD co-morbidity in boys and girls, despite ASD being known to be more common in boys. Others found that boys are more likely to experience co-morbid OCD and ASD than girls. 

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