27/06/2026
āAutism and ADHD are on the rise due to widening diagnostic criteriaā according to the New Scientist, citing a recent study from Denmark by LaBianca et al.
So much to say about this, starting with:
- The study that is referenced is pre-print, and hasnāt been peer reviewed yet š¤Æ
- The study looked at people diagnosed with autism and ADHD and compared it to their polygenic score. This is an estimate of their inherited genetic susceptibility to autism or ADHD based on many common genetic variants.
- They found that people diagnosed in the 1990s tended to have, on average, higher polygenic scores for autism or ADHD than people diagnosed in the 2010s.
- What does that mean? Well, if the underlying prevalence of autism or ADHD has stayed the same but more people with lower support needs were being diagnosed, thatās the sort of pattern youād expect.
- There was no evidence in the study that this change was due to widening diagnostic criteria. The study authors SUGGESTED this might be the reason.
- The New Scientist has reported on this suggestion as though it is scientific truth.
- The change could just as easily be due to increased awareness of autism and adhd; more referrals; and better identification of underdiagnosed groups like women, girls and adults.
So yes, the wording of diagnostic manuals has changed. But also, clinicians now recognise presentations that were often overlooked decades ago.
Reporting like this is frustrating because it takes a study that raises some interesting questions (as good studies should), and reduces it to click bait. As always, reality is more complicatedā¦
References in the comments
Lucy Pollard Therapies