A new global study has revealed that one in 127 people, or approximately 61.8 million individuals worldwide, are on the autism spectrum—a figure nearly double previous estimates.
The study, conducted by researchers from 10 Australian institutions, including the University of Queensland and the University of Sydney, was published in The Lancet Psychiatry. Using 2021 data, the research highlights a significant increase in autism prevalence compared to the last global assessment based on 2019 data, which estimated the prevalence at one in 271 people.
This substantial difference is attributed to improved methodologies, with researchers excluding studies that likely underestimated autism rates.
Gender Disparities in Diagnosis
The study found that autism spectrum disorder (ASD) is twice as prevalent in males compared to females. However, researchers suggest this disparity may be partially due to diagnostic gaps. Girls often receive a diagnosis later or remain undiagnosed due to differences in symptom presentation.
There is also speculation that genetic factors may offer girls a degree of “protection” against the condition, according to The Transmitter, a neuroscience-focused publication.
Impact on Youth
ASD was found to be most common among individuals under 20 years old. The study underscores the importance of early detection and support for autistic young people and their caregivers. Signs of autism typically emerge between the ages of one and three, according to the American Psychiatric Association.
“Autistic people are at an increased risk of social isolation, academic or employment difficulties, and might require psychosocial support into adulthood,” the study’s authors noted. They emphasized that early diagnosis can lead to better outcomes by enabling timely interventions.
Global Perspective and Challenges
The findings align with estimates from the World Health Organization (WHO), which states that one percent of children globally have autism. The researchers called for improved precision and better global representation in autism prevalence data.
“Work to improve the precision and global representation of our findings is required, starting with better global coverage of epidemiological data,” the study’s authors stated.
Autism, a complex neurodevelopmental condition, varies widely in its manifestations. Common characteristics include difficulties in social communication and interaction, sensory processing challenges, and repetitive behaviors. The condition persists throughout life and requires tailored support for individuals across all stages of development.
This latest research highlights the need for enhanced awareness, better diagnostic tools, and comprehensive support systems for individuals with autism worldwide.