Psychiatric News (2/9) reports a study of Swedish registry data found that “the male-to-female ratio of autism spectrum disorder (ASD) may be more equal than commonly believed.” The research team “analyzed nearly 2.8 million individuals born in Sweden between 1985 and 2020 – identifying 78,522 (2.8%) who were diagnosed with ASD by the end of 2022. Across the whole cohort, the male-to-female ratio of ASD was 1.6:1 – though the data showed that the yearly gap has been shrinking over time.” They noted the “average age of ASD diagnosis was 14 years – among males, diagnoses peaked between ages 10 to 14 while in females diagnoses peaked between ages 15 to 19. In 2022, the ASD male-to-female ratio at age 10 was 3:1 – but by age 20, the ratio dropped to 1.2:1.” The findings “show a pattern of significant ‘catch-up’ in recognizing ASD in females over the past 40 years in Sweden.” The study was published in The BMJ.
Related Links:
— “Is Autism a Predominantly Male Disorder?, Psychiatric News , February 9, 2026