About 53 per cent of adults with ADHD (Attention Deficit Hyperactivity Disorder) chose to keep their diagnosis to themselves, with 66 per cent of young women (aged 18–34) choosing to remain silent compared to 42 per cent of young men, signalling an inherent societal bias. 

According to the non-profit organisation Understood.org, about 63 per cent of adults with a learning or thinking difference wish they had been diagnosed earlier in life.