New Zealand has its first national picture of how many children live with conditions like ADHD, autism and intellectual disability, and it suggests that many are never picked up by the health system at all. The report finds that whether a child is identified early has as much to do with where they live and how well off their family is as it does with the child themselves.
The report was released this week by the New Zealand Child and Youth Epidemiology Service, based at the University of Otago, and was commissioned by The Paediatric Society of New Zealand and Health New Zealand. Titled Kanorau ā-roro, a te reo Māori phrase meaning the many faces of the mind, it covers children and young people aged from birth to 24 across the country.
What makes it a first is the data behind it. Earlier work on these conditions was regional and patchy. This report draws on linked national datasets, including hospital records, disability support data, pharmaceutical dispensing and specialist mental health records, joined together through Statistics New Zealand’s Integrated Data Infrastructure. That linking allows a single national view of who is being identified, where, and at what age.
The report looks at seven categories of neurodevelopmental condition. They are attention deficit hyperactivity disorder, autism, intellectual disability, foetal alcohol spectrum disorder, communication or language disorders, specific learning disorders and motor disorders. For each one it sets out how common it is, the age at which children are diagnosed, how that varies by region and background, and what the best evidence says works.
Around 6 percent of children aged 10 to 14 have a recorded neurodevelopmental condition. Yet the rates the health system is picking up sit well below international estimates. Overseas, roughly 8 percent of children meet the criteria for ADHD and 1 to 2 percent for autism. In New Zealand the service-identified rates are 2 to 4 percent for ADHD and about 1 percent for autism. The authors are clear that these figures only capture children who have already reached health and disability services, and that the true number in the community is likely to be considerably higher.
The gap is not spread evenly. According to the report, children in rural areas and those from more deprived communities are often diagnosed later, and there is up to a three-year difference in the average age at diagnosis between districts. That is a long time in a child’s development, and it points to real variation in how easy it is to get seen depending on where a family happens to live.
Girls come off worst on identification. The report finds they remain under-identified across all conditions, and particularly for ADHD and autism, where the signs can present differently and are more easily overlooked. That echoes a long-running concern among clinicians that diagnostic checklists were built largely around how these conditions show up in boys.
Family circumstances shape the picture too. About 0.7 percent of 10 to 14 year olds have an identified intellectual disability, and that condition is nearly three times as common in children living with the highest levels of deprivation as in those with the least. Only around a third of children with an intellectual disability have that as their sole diagnosis. Most live with other conditions alongside it, which the report describes as complex, high-needs situations that place heavy demands on families and services.
Overlapping conditions turn out to be the norm rather than the exception. Around one in four children and young people with a neurodevelopmental condition live with two or more diagnoses, most commonly ADHD together with autism, or autism with a specific learning disorder. In Counties Manukau, nearly half of the children with a recorded condition are identified as having more than one.
The report also sets out clear differences by ethnicity in who gets a diagnosis. It finds that European children are the most likely to be identified, while Pacific, Asian and other minority children are the least likely, despite there being no evidence that the underlying need is any lower in those communities. For Māori and Pacific children the pattern for ADHD runs the opposite way to what you might expect, with greater disadvantage linked to a lower chance of being identified rather than a higher one.
Alongside the numbers, the report reviews what actually helps. It points to early identification, family-centred support and sustained, practical help focused on how a child functions day to day as the most effective approaches. It also highlights newer models that are showing promise, including nurse practitioner-led assessment pathways in some districts that have cut waiting times and improved access. It calls for joined-up referral routes that connect medical, educational and community support, especially for the families who currently hit barriers at several points.
Dr Sonja Crone, President of the Paediatric Society of New Zealand, said the report was an important start but only a partial view. \”To truly understand the impact on our tamariki and whānau, we must look through an Aotearoa-specific lens. This report is a landmark first step in identifying prevalence within the health system, but we know these figures are just the tip of the iceberg. Further research is vital to ensure we can direct the right supports to every child, allowing them the opportunity to flourish,\” she said.
The authors acknowledge that the clinical language used to describe these conditions is largely deficit-based, and argue that strengths-based frameworks and Māori language and concepts should sit at the centre of how neurodiversity is understood and supported. The full report is available through the New Zealand Child and Youth Epidemiology Service, and further coverage of the findings has appeared at the New Zealand Herald and Scoop.
Have you or your child faced a long wait for an assessment, or found support hard to reach where you live? Share your experience in the comments below.
This article was written by AI, briefed to report the facts, hopefully without some of the bias people bring to the job 🙂
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