Four in five adults assessed for autism or ADHD in last year received a diagnosis

More than four in five adults assessed for autism or ADHD in Jersey received a diagnosis, new figures have revealed.

The figures, published by the Health Department, showed that 82% of assessments carried out on adults during the 12 months to July resulted in a diagnosis.

Across adults and children, 73.8% of all autism and ADHD assessments undertaken between August 2025 and July 2026 led to a diagnosis.

The figures also revealed that 602 assessments were carried out on children during the year, of which 395 – or 65.6% – resulted in a diagnosis. The proportion was broadly similar for both conditions.

Of 244 autism assessments undertaken on children, 162 resulted in a diagnosis – equivalent to 66.4%.

Meanwhile, 233 diagnoses followed 358 childhood ADHD assessments, representing 65.1% of the total.

The government stressed that the figures related to the number of assessments undertaken rather than the number of individual children seen.

Some young Islanders may have undergone separate assessments for both ADHD and autism during the 12-month period and could therefore appear in the figures twice.

The response did not provide a breakdown of the number of adult assessments carried out, or separate adult diagnosis rates for autism and ADHD.

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