Although significance was not reached for the differences when comparing the two ADHD subtypes (2.37 ± 2.83 pg/mL in ADHD-AD vs. 1.47 ± 1.9 pg/mL in ADHD-C), IL-10 concentration was significantly higher in patients with ADHD-AD and ODCD (3.93 ± 3.06 in the presence of ODCD, 1.70 ± 2.56 pg/mL in the absence of ODCD; [F (1.18) = 4.7, p < 0.04]). This evidence concerns the gene IL10 and odontochondrodysplasia 1.