Using the norm T-values for the sub-scales of the Conners' ratings to contrast ADHD- and control children with high (T ≥ 65, n = 16) and low (T ≤ 50, n = 12) total DSM or inattentive DSM CPRS ratings showed there were no differences in the levels of S100B. Here, S100B is linked to attention deficit-hyperactivity disorder.