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Table 1 Mean Scores of Four Comparison Groups on Demographic and HIA-CP Variables

From: Revisiting Lynam's notion of the "fledgling psychopath": are HIA-CP children truly psychopathic-like?

  Non-HIA-CP
(n= 517)
HIA-only
(n= 48)
CP-only
(n= 23)
HIA-CP
(n= 29)
Variable M (SD) M (SD) M (SD) M (SD)
Demographics
   Age 9.60 (1.20) 9.37 (1.16) 9.73 (1.29) 9.36 (1.27)
   Gender (% male) 45.26a   62.50b   52.17a, b   65.52b  
   IQ 106.30a    (16.13) 97.90b (19.58) 101.35a, b (20.24) 92.81b (14.22)
SDQ (Teacher)
   Hyperactivity 1.66 a (1.91) 8.10b (0.99) 3.52c (2.08) 8.97d (1.12)
   Conduct Problems 0.42a (0.80) 1.71b (0.99) 4.39c (0.58) 5.52d (1.62)
  1. Note. Means with different subscripts differ significantly at p < .05. SDQ = Strength and Difficulties Questionnaire.