Health service utilization among autistic youth in Aotearoa New Zealand: A nationwide cross-sectional study.

Lay abstract: Autistic youth generally use healthcare services more often than non-autistic youth. However, we know very little about the factors that can affect health service use and the types of services that are used, and this has not been explored in Aotearoa New Zealand. We analysed data from New Zealand to compare health service use among autistic and non-autistic youth (0 to 24-year-olds). Data were available for 19,479 autistic youth and 1,561,278 non-autistic youth. We compared hospitalizations, specialist visits, emergency department visits and use of different types of medications. In this study, autistic youth were found to have been hospitalized for medical and mental health reasons, more often than non-autistic youth. Autistic youth were also more likely to have attended specialist appointments and to have been given medication. These differences were particularly large for medications commonly used for mental health conditions (e.g. anxiety, depression, attention deficit hyperactivity disorder) or associated symptoms. Autistic youth who also had an intellectual disability were more likely to use healthcare services for physical health conditions, but were less likely to use mental health services, when compared with autistic youth who did not have an intellectual disability. These findings, along with other research, suggest that the healthcare needs of autistic youth are not always being met. Further work is needed to enhance our understanding of co-occurring conditions among autistic youth, including those that result in high rates of health service use, in order to inform the development of healthcare services and training for healthcare professionals to better cater to the needs of autistic youth.