Table 1 Characteristics of TD, ADHD-C and ADHD-I participants.

From: Peer victimization and the association with hippocampal development and working memory in children with ADHD and typically-developing children

 

TD

n = 218

ADHD-C

n = 108

ADHD-I

n = 124

Age, years, median [IQR]

9.80 [7.90 to 12.72]

8.80 [7.26 to 11.24]

10.60 [8.58 to 13.05]

Male, % (n)

50.5 (110)

79.6 (86)

75.8 (94)

MRI site, % (n)a

CBIC

14.2 (31)

25.0 (27)

27.0 (34)

RU

34.9 (76)

31.5 (34)

47.6 (59)

SI

26.1 (57)

16.7 (18)

5.60 (7)

Unknown

0.9 (2)

0 (0)

0 (0)

BSMSS total, median [IQR]

53.00 [46.00 to 61.00]

53.00 [44.88 to 61.00]

53.00 [45.00 to 59.50]

SWAN, median [IQR]

Hyperactivity-Impulsivity

− 0.11 [− 1.42 to 0.22]

1.11 [0.67 to 1.67]

0.22 [0.00 to 0.67]

Inattention

− 0.06 [− 1.22 to 0.44]

1.11 [0.67 to 1.67]

1.22 [0.56 to 1.89]

CBCL, median [IQR]

Aggressive behaviour

3.00 [0.00 to 5.00]

8.00 [4.25 to 13.00]

4.00 [1.00 to 8.00]

Rule breaking behaviour

1.00 [0.00 to 2.00]

3.00 [1.00 to 5.00]

2.00 [0.00 to 3.00]

Social problems

1.00 [0.00 to 3.00]

3.50 [1.00 to 6.00]

2.00 [0.00 to 3.75]

Withdrawn

1.00 [0.00 to 2.00]

1.00 [0.00 to 3.00]

1.00 [0.00 to 3.00]

Peer victimization

0.00 [0.00 to 0.00]

1.00 [0.00 to 2.00]

0.00 [0.00 to 1.00]

WISC-V, median [IQR]

FSIQ

106.00 [95.00 to 113.00]

105.00 [91.75 to 113.00]

99.00 [88.00 to 109.00]

WMI

100.00 [91.00 to 112.00]

100.00 [91.00 to 110.00]

94.00 [88.00 to 107.00]

Brain Volumes, Median [IQR]

TCV (mm3)

1,176,718.50 [1104748.00 to 1,268,853.75]

1,202,310.00 [1104571.00 to 1,260,378.00]

1,217,219.00 [1142320.00 to 1,334,728.00]

Left CA3 (mm3)

178.68 [162.48 to 199.21]

178.74 [165.64 to 203.56]

200.11 [182.77 to 216.74]

Left CA4 (mm3)

234.68 [215.67 to 255.58]

233.00 [218.29 to 252.00]

250.05 [230.20 to 268.30]

  1. Clinical and demographic factors: IQR, interquartile range; CBIC, Citigroup Biomedical Imaging Center; RU, Rutgers University; SI, Staten Island Diagnostic Research Center; BSMSS, Barratt Simplified Measure of Social Status; SWAN, Strengths and Weaknesses Assessment of ADHD and Normal Behaviour; CBCL, Child Behaviour Checklist; TCV, total cerebral volume; Left CA3, Cornu Ammonis 3; WISC-V, Wechsler Intelligence Scale for Children-v; FSIQ, Full Scale IQ; WMI, Working Memory Index.
  2. aMRI site used as covariate in aims 2 and 3.
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