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. Author manuscript; available in PMC: 2018 Mar 30.
Published in final edited form as: Psychiatry Res. 2017 Jan 6;261:20–28. doi: 10.1016/j.pscychresns.2017.01.002

Table 1.

Demographic and clinical characteristics of ADHD and TD groups overall and within sex

TD ADHD ADHD vs. TD
Girls (n=39) Boys (n=70) All (n=109) Girls (n=38) Boys (n=71) All (n=109) Girls Boys All
Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD p-values
Age (years) 10.09 1.10 10.12 1.70 10.02 1.41 10.11 1.46 9.99 1.38 10.11 1.14 .944 .527 .638
% Minority 33% 25% 28% 26% 30% 28% .501 .572 .996
SES 50.87 9.56 51.04 10.09 50.98 9.85 49.85 10.32 49.88 11.26 49.87 10.90 .657 .523 .435
Handedness R:L:M (count) 35:0:3 53:9:8 88:9:11 32:3:3 57:8:3 89:11:6 .209 .294 .437
FSIQ 110.31 9.36 111.16 9.76 110.85 9.56 107.08 13.90 106.14 11.84 106.47 12.54 .234 .007 .004
GAI 109.79 9.58 113.61 9.86 112.25 9.89 108.68 13.43 111.48 13.53 110.50 13.50 .677 .287 .278
VCI 112.33 11.52 115.96 11.36 114.66 11.49 109.66 14.05 111.82 14.30 111.06 14.19 .363 .059 .041
PRI 104.31 9.94 107.34 11.02 106.26 10.70 106.82 13.90 108.18 12.37 107.71 12.88 .364 .671 .367
WMI 106.26 11.44 106.33 11.58 106.30 11.48 102.92 15.58 101.00 13.21 101.67 14.04 .287 .012 .008
PSI 107.23 12.75 100.51 12.06 102.92 12.67 99.82 13.12 91.93 10.04 94.68 11.77 .014 <.001 <.001
ADHD Boys vs. ADHD Girls p-values
Conners IA T 46.66 5.67 44.01 4.40 44.96 5.03 80.24 9.40 68.78 8.40 72.85 10.31 n/a n/a <.001
Conners HI T 46.08 4.32 46.63 5.03 46.43 4.77 75.16 13.86 70.43 12.37 72.11 13.05 n/a n/a .073
Dysreg. T 51.27 1.85 51.13 1.87 51.19 1.85 63.70 6.64 61.09 5.89 62.11 6.29 n/a n/a .059
ADHD Subtype, CO:IA:HI (count) n/a n/a n/a 28:9:1 54:15:2 82:24:3 n/a n/a .954
% Stimulant Medication 0 0 0 66% 67% 67% n/a n/a .848
ODD 0 0 0 42% 35% 38% n/a n/a .479

Note. % Minority=Percentage of subjects with a self-reported race of African American, Asian, Hispanic, or Biracial; SES=Hollingshead Four-Factor Index of Socioeconomic Status*missing for 2 kids; Handedness=Edinburgh Handedness Inventory*missing for 4 kids; FSIQ=Wechsler Intelligence Scale for Children Fourth Edition (WISC-IV) Full-scale IQ; GAI=WISC-IV General Ability Index; VCI=WISC-IV Verbal Comprehension Index; PRI=WISC-IV Perceptual Reasoning Index; WMI=WISC-IV Working Memory Index; PSI=WISC-IV Processing Speed Index; Conners IA T=Conners’ Parent Rating Scales DSM Inattention Scale T-score; Conners HI T=Conners’ Parent Rating Scale DSM Hyperactivity/Impulsivity Scale T-score; Dysreg. T = CBCL Dysregulation Index T-score; CO=Combined subtype; IA=Inattentive subtype; HI=Hyperactive/Impulsive subtype; % Stimulant Medication = Percentage of subjects taking stimulant medication; ODD=Oppositional Defiant Disorder.