Bowden, NicholasAnns, FrancescaClendon, SallyDacombe, JoanneMeehan, LisaVu, HienWoodford, EmmaMcLay, Laurie2026-04-072026-04-072026-03-19Int J Popul Data Sci, ISSN: 2399-4908 (Print); 2399-4908 (Online), Swansea University, 10(2), 3362-. doi: 10.23889/ijpds.v10i2.33622399-49082399-4908http://hdl.handle.net/10292/20878INTRODUCTION: Participation in education underpins positive lifelong outcomes, yet Autistic children often encounter barriers to enrolment, attendance, and access to support. Evidence indicates that systemic challenges such as inadequate support, limited autism-specific teacher training, and restricted access to resources contribute to disparities in educational outcomes. While small sample studies highlight these inequities, population-level evidence is limited. OBJECTIVES: To quantify nationwide differences in school enrolment, attendance, and access to educational resourcing and support services between Autistic and non-Autistic children aged 5-12 years in Aotearoa New Zealand (NZ), and to examine variation by co-occurring intellectual disability (ID). METHODS: Cross-sectional analysis using NZ's Integrated Data Infrastructure, including all children aged 5-12 in 2019. Autism and ID were identified from hospital, mental health, and disability service use datasets. Outcomes included enrolment, attendance, and access to supports. Propensity score matching (1:10) compared Autistic and non-Autistic students across outcomes, including stratification by ID status. RESULTS: Among 517,872 students aged 5-12 years, 8,169 (1.6%) were Autistic and of those 28.8% had co-occurring ID. Compared to matched peers, Autistic children were less likely to be enrolled in school (94.9% vs. 97.4%; Prevalence ratio [PR]=0.97, 95% confidence interval [CI]=0.97-0.98) but more likely to be enrolled in specialist schools (14.4% vs. 0.2%; PR=70.15, 95% CI=65.73-74.88), Te Kura (2.1% vs. 0.2%; PR=9.65, 95% CI=8.22-11.34), or home-schooling (2.2% vs. 0.9%; PR=2.45, 95% CI=2.11-2.84). Regular attendance was lower (49.3% vs. 61.2; PR=0.80, 95% CI=0.79-0.82), with higher rates of chronic absence (7.7% vs. 3.2%; PR=2.45, 95% CI=2.27-2.64). Access to supports was significantly higher for Autistic students across a range of services. Disparities were often more pronounced among Autistic children with ID. CONCLUSION: This study demonstrates significant differences in enrolment, attendance, and access to educational supports between Autistic and non-Autistic students in NZ, underscoring the urgent need for targeted and sufficiently resourced supports to ensure equitable participation.Copyright. CC-BY. This work is licensed under a Creative Commons Attribution 4.0 International License.autismeducationschool attendanceschool enrolmentsupports42 Health SciencesBehavioral and Social ScienceAutismMental HealthBrain DisordersClinical ResearchPediatric Research InitiativeIntellectual and Developmental Disabilities (IDD)Health Disparities and Racial or Ethnic Minority Health ResearchHealth ServicesMental health4 Quality Education3 Good Health and Well Being42 Health sciences44 Human society46 Information and computing sciencesHumansCross-Sectional StudiesNew ZealandChildChild, PreschoolMaleFemaleAutistic DisorderIntellectual DisabilityStudentsSchoolsHumansCross-Sectional StudiesNew ZealandChildChild, PreschoolMaleFemaleAutistic DisorderIntellectual DisabilityStudentsSchoolsJournal ArticleOpenAccess10.23889/ijpds.v10i2.3362