Millions Living with Undiagnosed Autism, Study Reveals

Kokcha News Agency – Autism, a neurodevelopmental disorder affecting over 5 million adults and 2 million children in the U.S., is often diagnosed based on developmental history and behavioral assessments rather than definitive medical tests like blood tests or MRIs, making diagnosis challenging.

A recent study by Epic Research analyzed data from more than 338,000 patients diagnosed with autism spectrum disorder (ASD) between 2015 and 2024. The research found that while the average age of diagnosis has decreased from 7 in 2015 to 6 in 2024, there are notable gender disparities.

For boys, the average age of diagnosis dropped from 7 in 2015 to 5 in 2024. However, for girls, the age remained nearly unchanged at 8. In 2024, 44% of boys diagnosed with autism were under 5, compared to only 34% of girls. Additionally, 25% of women were diagnosed with autism in adulthood, compared to 12% of men.

Dr. Brian Harris explains this disparity: “A noisy and active boy may attract attention, while a quieter girl with subtle symptoms may go unnoticed.”

Historically, autism was thought to affect 2 to 4 in 10,000 children in the 1960s and 70s. However, as diagnostic criteria evolved, rates have risen sharply. By 2000, autism was reported in 1 in 150 children, according to the Daily Mail.

Since 2020, Asian, Black, and Hispanic children have been diagnosed with autism at higher rates than white children. Experts attribute this increase to the widespread use of screening tests, greater public awareness, and improved access to healthcare.

Some groups also suggest that the rise in autism rates may be linked to highly processed foods, chemicals, and pesticides.

Early Signs at Age 2
While the average age of diagnosis is around 5, many parents notice differences in their children’s social skills as early as age 2. Experts also emphasize the need for more research into the walking patterns (gait) of autistic individuals to better understand the condition.