The Relationship between the Polymorphism and Omission Errors in Korean Children with Attention Deficit Hyperactivity Disorder.

Objective: This study aimed to investigate the association between the synaptosomal-associated protein 25 kDa () genotype and performance on the continuous performance test (CPT) in Korean children with attention-deficit/hyperactivity disorder (ADHD).

Methods: Eighty-seven children with ADHD (mean age, 9.23±1.99 years) participated in this study. Omission errors, commission errors, reaction time, and reaction time variability on the CPT were analyzed. The single-nucleotide polymorphism (SNP) rs3746544 (1065 T＞G) of was genotyped to examine the association with CPT performance.

Results: We found significantly more omission errors on the CPT among children with the TT genotype of (t=2.56, =0.012) after correcting for multiple testing.

Conclusion: Our results suggest the possible involvement of the 1065 T＞G polymorphism in the inattention phenotype in children with ADHD. Further studies with more refined neuropsychological measures and much larger sample sizes are needed to confirm our findings.