Table 1.
Participant demographic information at each visit.
| Visit 1 | Visit 2 | Visit 3 | |||||||||||||
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| ADHD | TD | p | ADHD | TD | p | ADHD | TD | p | |||||||
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| M (SD) | Min–max | M (SD) | Min–max | M (SD) | Min–max | M (SD) | Min–max | M (SD) | Min–Max | M (SD) | Min–Max | ||||
| Age (months) | 63.00 (6.89) | 49.92–71.87 | 60.37 (6.10) | 49.55– 71.74 | .171 | 74.23 (6.87) | 61.92– 84.72 | 72.38 (6.14) | 60.96– 83.04 | .334 | 86.17 (6.91) | 73.99– 95.88 | 83.85 (6.63) | 72.00– 95.04 | .249 |
| FSIQ | 108.86 (13.97) | 89–146 | 111.68 (15.01) | 79–134 | .516 | 108.81 (13.35) | 86–143 | 114.50 (13.06) | 74–135 | .148 | 108.33 (15.27) | 88–143 | 113.82 (13.84) | 87–140 | .322 |
| PSQ | 96.29 (17.29) | 68–128 | 105.24 (13.36) | 83–137 | .054 | 96.43 (19.85) | 64–128 | 107.04 (14.81) | 68–134 | .041 | 97.67 (21.10) | 73–143 | 108.94 (17.03) | 80–145 | .123 |
| CPRS-R L (raw) | 15.71 (5.91) | 4–24 | 2.28 (3.45) | 0–11 | <.001 | 4–22 | 3.16 (3.66) | 0–13 | <.001 | 12.90 (5.31) | 2–23 | 3.92 (5.46) | 0–21 | <.001 | |
| CPRS-R L (T-score) | 74.95 (13.16) | 48–90 | 44.80 (6.40) | 40–61 | <.001 | 65.10 (11.04) | 50–83 | 46.20 (6.73) | 40–65 | <.001 | 63.85 (10.68) | 46–90 | 46.96 (8.84) | 40–74 | <.001 |
| CPRS-R M (raw) | 15.76 (5.75) | 4–27 | 3.64 (4.05) | 0–12 | <.001 | 13.30 (6.42) | 2–26 | 3.96 (3.40) | 0–12 | <.001 | 13.75 (6.58) | 3–26 | 4.77 (5.30) | 0–21 | <.001 |
| CPRS-R M (T-score) | 70.43 (11.78) | 49–90 | 46.04 (6.77) | 39–60 | <.001 | 66.45 (13.10) | 47–89 | 47.92 (6.28) | 39–63 | <.001 | 68.35 (13.05) | 49–89 | 50.58 (9.82) | 41–80 | <.001 |
One participant had initial FSIQ of 79; however, since that individual also had VCI = 90, he was retained in the study. ADHD: Attention-deficit/hyperactivity disorder; TD: typically developing; FSIQ: Full Scale IQ; PSQ: processing speed quotient; CPRS-R: Conners’ Parent Rating Scale-Revised; L scale: DSM Inattention; M Scale: DSM Hyperactivity/Impulsivity.