Around 90% of middle-aged and older autistic adults are undiagnosed in the UK, new review finds
89 to 97% of autistic adults aged 40+ years are undiagnosed in the UK, according to the largest review of its kind which was conducted at the Institute of Psychiatry, Psychology & Neuroscience at King’s College London. The review indicated that middle-aged and older autistic adults are facing higher rates of mental and physical health conditions than non-autistic adults of the same age, alongside challenges with employment, relationships and wellbeing.
By NIHR Maudsley BRC at 29 Aug 2025