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Table 1 Comparison of CU traits among the ADHD only, ADHD + ODD and TDC groups (mean ± SD)

From: Callous-unemotional traits in Chinese preschool children with attention-deficit/hyperactivity disorder

Subscales

ADHD only (n = 55)

ADHD + ODD (n = 34)

TDC (n = 87)

F

Post hoc test

Callousness

8.67 ± 5.29

10.82 ± 4.83

5.45 ± 3.58

20.42***

ADHD + ODD > ADHD > TDC

Uncaring

15.87 ± 4.03

16.82 ± 3.75

10.79 ± 4.07

40.60***

ADHD = ADHD + ODD > TDC

Unemotional

4.83 ± 2.45

4.18 ± 2.39

4.23 ± 2.34

1.27

n.s.d

Total ICU

29.70 ± 10.4

32.04 ± 8.30

21.39 ± 7.40

30.12***

ADHD = ADHD + ODD > TDC

  1. ***P < 0.001
  2. n.s.d. not significant difference, CU callous-unemotional, ADHD only ADHD alone, ODD oppositional defiant disorder, ADHD + ODD ADHD and comorbid ODD, TDC typically developing child, ICU inventory of callous-emotional traits