Figure 1.

Performance related to treatment risk arm. Black line indicates the expected rate of below-average scores (16%). The asterisk signifies a statistically significant difference in rate of below-average performance between low- and standard/high-risk arms based on univariate logistic regression. All statistical tests were two-sided. WIAT = Wechsler Individual Achievement Test; CPT = Conners’ Continuous Performance Test; CVLT = California Verbal Learning Test; CPRS = Conners’ Parent Rating Scale; FSIQ = Full Scale Intelligence Quotient; FFD= Freedom From Distractibility Index; RT = reaction time; SD = short delay; LD = long delay; Proc Speed = processing speed; Impuls-Hyper = Impulsivity–Hyperactivity Index.