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Clinical genetic testing is recommended for individuals diagnosed with autism spectrum disorder. There are only a few reports of how these recommendations are followed and especially missing for European countries. We aimed to analyze the rate of access, utilization, and awareness of clinical genetic testing among autistic individuals in Sweden through online surveys targeting parents with at least one autistic child and autistic adolescents (from 15 years) and adults. In total, 868 parents of autistic children and 213 autistic adolescents or adults completed the survey. Only 9.1% ( n = 79) of parents and 2.8% ( n = 6) of autistic adolescents/adults reported having received a referral for clinical genetic testing after autism spectrum disorder diagnosis. The autistic children offered a referral were younger at diagnosis ( p &lt; 0.001) and more likely to have an additional neurodevelopmental diagnosis ( p &lt; 0.01), including intellectual disability ( p &lt; 0.001) or a language disorder ( p &lt; 0.001). Genetic counseling was provided to less than half of the families that were referred for clinical genetic testing. Finally, we report that both respondent groups preferred to be informed by written text and an expert in genetics about clinical genetic testing. This study highlights a lack of awareness and access to clinical genetic testing after autism spectrum disorder diagnosis in Sweden and demonstrates the need for additional studies on how clinical guidelines for genetic testing are followed in different countries.    Lay abstract   Several medical professional societies recommend clinical genetic testing for autistic individuals as many genetic conditions are linked to autism. However, it is unclear to what extent autistic individuals and parents of autistic children are offered clinical genetic testing. We conducted a community-based survey to estimate the access, utilization, and awareness for clinical genetic testing in Sweden. In total, 868 parents of autistic children and 213 autistic adolescents or adults participated as respondents. The referral rate for clinical genetic testing after autism spectrum disorder diagnosis was low, with only 9.1% for the autistic children as reported by their parents and 2.8% for autistic adolescents/adults. The autistic children who got referrals were more likely to have intellectual disability and language disorder. We also report that awareness of the clinical genetic testing possibility was low in both respondent groups. We also highlight preferred communication means and needs for information before clinical genetic testing. Our results show that utilization and access are low in Sweden, and more studies should be conducted to report these rates in different countries to analyze the effects of clinical genetic testing on healthcare for autistic individuals. Our results highlight the most important information for the families and how the information should be communicated prior to clinical genetic testing.

Access, utilization, and awareness for clinical genetic testing in autism spectrum disorder in Sweden: A survey study