Skip to main content
. Author manuscript; available in PMC: 2018 Jan 30.
Published in final edited form as: Psychiatry Res. 2017 Nov 2;271:67–74. doi: 10.1016/j.pscychresns.2017.10.013

Table 1. Demographic and clinical characteristics of ADHD and TD groups overall and within sex.

Control ADHD Group Comparisons
Girls (n = 15) Boys (n = 25) All (n = 40) Girls (n = 17) Boys (n = 30) All (n = 47) Girls TD vs. ADHD Boys TD vs. ADHD All TD vs. ADHD ADHD Boys vs. Girls
Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD p-values
Age (years) 4.8 0.5 5.0 0.6 5.0 0.6 5.3 0.6 4.9 0.6 5.1 0.6 0.032 0.488 0.432 0.082
% Male n/a n/a 62.5% n/a n/a 63.8% n/a n/a 0.898 n/a
SESa 58.9 7.5 55.5 12.8 56.8 11.1 55.8 13.0 57.4 9.7 56.8 10.9 0.421 0.541 0.993 0.639
WPPSI-3b FSIQ 110.5 13.4 110.4 16.7 110.5 15.4 110.0 12.0 110.0 14.6 110.0 13.5 0.906 0.912 0.874 0.993
CELF-P2c Core Lang 110.3 10.4 104.2 11.7 106.5 11.5 109.3 7.9 105.9 13.0 107.2 11.4 0.766 0.619 0.785 0.334
CPRSd IA raw 0.8 1.3 2.7 3.4 2.0 2.9 15.4 4.5 16.0 6.3 15.8 5.6 < 0.001 < 0.001 < 0.001 0.740
CPRS IA T 43.1 3.5 45.3 6.6 44.5 5.7 79.4 8.9 70.8 11.8 73.9 11.5 < 0.001 < 0.001 < 0.001 0.015
CPRS HI raw 3.2 2.8 3.4 3.6 3.3 3.3 15.6 5.6 18.3 5.5 17.3 5.6 < 0.001 < 0.001 < 0.001 0.124
CPRS HI T 47.5 6.2 45.0 6.1 45.9 6.2 75.3 12.6 70.3 9.3 72.1 10.8 < 0.001 < 0.001 < 0.001 0.138
CPRS Tot raw 4.0 3.1 6.1 6.0 5.3 5.2 31.0 8.7 34.3 10.0 33.1 9.6 < 0.001 < 0.001 < 0.001 0.274
CPRS Tot T 45.3 4.0 44.8 5.6 45.0 5.0 79.6 10.1 72.0 9.6 74.8 10.4 < 0.001 < 0.001 < 0.001 0.018
ADHD subtype (count) CO:IA:HI n/a n/a n/a 13:2:2 17:6:7 30:8:9 n/a n/a n/a 0.395

Note. ADHD = Attention-deficit/Hyperactivity Disorder; SES=Hollingshead Four-Factor Index of Socioeconomic Status; WPPSI-3 = Wechsler Preschool and Primary Scale of Intelligence, 3rd Ed.; FSIQ = Full Scale IQ score; CELF-P2 = Clinical Evaluation of Language Fundamentals, Preschool, 2nd Ed.; Core Lang = Core Language score; CPRS IA = Conners' Parent Rating Scale-Revised Scale L (DSM-IV Inattentive raw/T-score); CPRS HI = Conners' Parent Rating Scale-Revised Scale M (DSM-IV Hyperactive/Impulsive raw/T-score); CPRS Tot = Conners' Parent Rating Scale-Revised Scale N (DSM-IV ADHD Total raw/T-score); CO= Combined subtype; IA= Inattentive subtype; HI = Hyperactive/Impulsive subtype.

a

SES missing for 3 children (3 ADHD boys);

b

WPPSI-3 missing for 1 child (1 ADHD boy);

c

CELF-P2 missing for 1 child (1 ADHD boy);

d

CPRS missing for 3 children (1 ADHD girl, 2 ADHD boys).