Estimate the accumulated prevalence of neurodevelopmental problems from preschool to school age in children with a history of febrile seizures (FS).
In a community-based cohort of children with previous FS, 25/73 clinically assessed children met diagnostic criteria for neurodevelopmental disorders or had major indications of such problems at the age of 4-5 years. Parents of 54 of the 73 children accepted to take part in an interview according to the Autism-Tics, ADHD and other Comorbidities (A-TAC) inventory, when the children were 9-10 years.
There was a trend for ADHD symptom scores to be higher in the FS group. Non-participants at age 9-10 years had had much higher rates of neurodevelopmental problems at 4-5 years, and the total number of such problems at either 4-5 or age 9-10 was 41% (30/73).
High rates of neurodevelopmental problems (41%) were found at either age 4-5 or 9-10 years or both in this group of 73 children with FS. Non-participants at 9-10 years had had much higher rates of neurodevelopmental problems at 4-5 years. Further follow-up of this cohort is needed before definite conclusions can be drawn about whether FS should be considered a marker for more complex neurodevelopmental problems.

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