ABSTRACTABBAS G. HAMEDANI. The Association Between Autism Spectrum Disorder and Asthma and use of additional services for their management in the national survey of children’s health (Under the direction of DR. YVETTE M. HUET)This study was conducted to provide additional data on the association in the diagnosis of Autism Spectrum Disorder (ASD) and Asthma among children aged 3 – 17 and the likelihood of utilizing additional services for the management of these conditions. Asthma is one of the most common chronic inflammatory diseases among children 18 years old and younger (~ 5 million). ASD is a neurodevelopment disorder characterized by language impairments, social and communication. ASD has an onset age of < 3 years old and affect one out of 2,500 children. Both Asthma and ASD patients utilize prescription medications but other services are available to these children for disorder management and their use can decrease the use of medications. Previous research has had mixed outcomes and because the NCHS survey has collected data from children with both conditions this research will use this data to more definitively answer questions regarding the association of Asthma and Autism Spectrum Disorder and the use of additional services by those children with this diagnosis. There were 60,951 children who responded to both ASD and asthma questions. The unadjusted weighted analysis showed the evidence of association between children with concurrent diagnoses of ASD and asthma among children aged 3 – 17 years old (OR=2.25 with 95% CI of 1.48 – 3.42). In addition, we found evidence for an association between severity of asthma and severity of ASD in the utilization of additional services in combination with prescription medication (OR=1.54 and OR=2.58 respectively). Finally, we found some evidence for use of additional services in combination with prescription medication in those children diagnosed with ASD and Asthma based on the severity of their ASD (OR=8.97).