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Table 5 Demographic and clinical characteristics of the study sample

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

  ADHD (n = 89) TDC (n = 87) F/χ2 p
ADHD only (n = 55) ADHD + ODD (n = 34)
Age (months), mean ± SD 56.40 ± 6.66 57.65 ± 9.77 55.16 ± 7.29 1.37 0.26
Sex, n (%)     3.39 0.18
 Female 12 (13.5) 20 (23.0)    
 Male 77 (86.5) 67 (77.0)