Part of the title to this post - "In 2024, the prevalence reached 21.1‰ among boys" - represents a detail from a recent paper titled: Epidemiology of Autism Spectrum Disorders in French Children Aged 8 https://link.springer.com/article/10.1007/s10803-026-07433-x
Alongside the observation that 21.1 per 1000 boys aged 8 years old may have autism in France (registry-based prevalence), the additional headline is that "ASD at age 8 increased markedly ranging from 2.1‰ in 2003 to 13.5‰ in 2024."
Around a third of kids with autism also had an intellectual (learning) disability and about a fifth had comorbid attention-deficit hyperactivity disorder (ADHD) according to this data. Oh and the sex ratio was 5:1 boys:girls.
I dunno. Is it perhaps time to starting worrying about how many children are presenting with clinically relevant behaviours leading to being diagnosed with a serious neurodevelopmental disability like autism? Y'know worrying to the extent that the old 'all better awareness' is basically a call for inaction rather than action around hows-and-whys? Worrying about what those figures mean for children (and no, they weren't 'masking' or other stuff), their families, education and healthcare systems and society more widely when it comes to adult outcomes like social care and employment et al?
Added to data from other geographies such as Northern Ireland (see here) where over the last 5 years, they've registered an increase in school-aged autism from 4.2% in 2019/2020 to 6.2% in 2025/2026 and now affecting 8.6% of boys, it's getting a bit concerning don't you think?
