Children diagnosed with attention-deficit/hyperactivity disorder (ADHD) earlier in childhood have better educational outcomes than those diagnosed in their later teenage years, according to a
study appearing in
JAMA Psychiatry.
Why It is Relevant
ADHD is often diagnosed during children’s early school years. However, a diagnosis may be delayed until adolescence when ADHD symptoms only become perceivable due to the onset of puberty or the increasing academic demands of middle and high school.
For other neurodevelopmental disorders such as autism, a timely diagnosis has been linked with improved outcomes—but as of yet no studies have examined the associations between age at ADHD diagnosis and educational outcomes.
By the Numbers
- Using data from the Finnish Medical Birth Register, the study authors identified 12,208 males and 3,753 females born between 1990 and 1999 who were diagnosed with ADHD between the ages of 4 and 20.
- Among males, grade point average (GPA) at age 16 decreased at each advancing age of diagnosis: Males diagnosed at age 4 had an average GPA of 7.12 whereas males diagnosed at 16 had a GPA of 6.52.
- Females showed a similar pattern, but decreases occurred between the ages of 6 and 12: Females diagnosed at age 6 had an estimated GPA of 7.64 at age 16 compared with 6.59 for those diagnosed at age 12.
- Males and females diagnosed at earlier ages were more likely to attend upper secondary education (versus vocational education) and had lower rates of school dropout compared with those diagnosed in later teen years.
The Other Side
While use of a Finnish national birth registry allowed for a large sample size, it’s unclear whether the results are generalizable to other countries, including the United States. Moreover, the study design didn’t allow researchers to assess a causal link between age at diagnosis and educational performance.
Takeaway Message
“The findings support the recommendations for earlier diagnosis, and screening for ADHD before age 12 years should be considered,” the study authors wrote. “Additional support should be directed to individuals who are diagnosed during the last years of compulsory education, as they were most at risk of school dropout in our study.”
Related Information
Source
Lotta Volotinen, et al. Age at first attention-deficit/hyperactivity disorder diagnosis and educational outcomes. JAMA Psychiatry. Published April 8, 2026. doi: 10.1001/jamapsychiatry.2026.0181.
(Image: Getty Images/iStock/J-Elgaard)
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