Table 1.
Demographic characteristics
| Whole Sample Mean (SD) |
IQ-Matched Sample Mean (SD) |
|||
|---|---|---|---|---|
| CD (n=22) | TD (n=27) | CD (n=16) | TD (n=16) | |
| Age | 15.04 (1.91) | 14.85 (2.19) | 14.89 (2.27) | 14.96 (2.01) |
| Full-Scale IQa | 94.05 (10.68) |
110.96 (12.39) |
99.13 (7.05) | 103.56 (9.99) |
| Sex Ratio (M:F) | 16:6 | 17:10 | 11:5 | 10:6 |
| Race (White:Non- White)b |
4:18 | 11:15 | 4:12 | 2:13 |
| ICU traitsc | 38.59 (10.10) |
14.85 (8.20) | 40.86 (11.35) |
17.88 (8.66) |
| APSDc | 28.29 (5.56) | 5.60 (3.45) | 28.40 (6.21) | 6.13 (3.79) |
| Handedness (R:L) | 22:5 | 18:4 | 12:4 | 14:2 |
| ADHD Co- morbidity (no ADHD:ADHD) |
10:12 | 27:0 | 8:8 | 16:0 |
| Psychotropic medication usage at time of scan (no meds:meds) |
13:9 | 27:0 | 11:5 | 16:0 |
Note: ADHD = attention-deficit/hyperactivity disorder.
a
In the whole sample only, IQ was significantly higher in the typically developing (TD) group than in the conduct disorder (CD) group.
b
In the TD groups, information on race could not be obtained from one participant.
c
In both the whole and the IQ-matched samples, Inventory of Callous-Unemotional (ICU) and Antisocial Process Screening Device (APSD) scores were significantly higher in the CD group than in the TD group.