Continuous Performance Test Is Sensitive to a Single Methylphenidate Challenge in Preschool Children With ADHD

Area of Science:

• Pediatric Neurology
• Child Psychiatry
• Neurodevelopmental Disorders

Background:

• Preschoolers with Attention-Deficit/Hyperactivity Disorder (ADHD) lack evidence-based diagnostic tools and personalized interventions.
• Continuous Performance Tests (CPTs) are used to assess attention but require further validation in this age group.

Purpose of the Study:

• To evaluate the impact of a single methylphenidate (MPH) challenge on the performance of preschoolers with ADHD on a CPT.
• To explore the relationship between CPT performance and ADHD symptom ratings in this population.

Main Methods:

• Sixty-one preschoolers diagnosed with ADHD underwent the Test of Variables of Attention (TOVA), a CPT, before and after a single MPH challenge (0.3 or 0.5 mg/kg).
• Baseline TOVA performance was correlated with Conners' Rating Scales (CRS) scores.

Main Results:

• At baseline, a high rate of omission errors was observed on the TOVA, with significant correlations between TOVA metrics and CRS scores.
• A single MPH challenge led to significant improvements in TOVA performance and was well-tolerated by the children.

Conclusions:

• The TOVA may serve as a valuable tool for assessing MPH response in preschoolers with ADHD.
• This assessment can aid in the development of personalized intervention strategies for young children with ADHD.