Table 3. Characteristics (mean (SD)) of the Genetic and Serum Samples.
| Genetics sample (N = 133) | Serum Sample (N = 66) | |
| Age | 7.56 (3.20) | 6.89 (2.25) |
| QFE | 74.28 (12.87) | 74.69 (13.30) |
| ABS | 7.80 (2.48) | 8.61 (1.72) |
| Antisocial severity | 4.05 (0.77) | 4.06 (0.82) |
| ADHD severity | 2.07 (2.02) | 1.98 (2.09) |
| Anx/Dep severity | 0.65 (1.37) | 0.53 (1.28) |
| ASD severity | - | 0.20 (0.81) |
| CU traits | 7.26 (2.84) | 7.50 (2.81) |
| CU traits 66th percentile | 8 | 8 |
| Ethnicity | Caucasian 100% | Caucasian 66.66% |
| Asian 16.66% | ||
| Other/Unknown 16.66% |
Note: QFE = Quality of the Family Environment, ABS = Australian Bureau of Statistics, Antisocial = Conduct Disorder/Oppositional Defiant Disorder, ADHD = Attention Deficit Hyperactivity Disorder, Anx/Dep = Anxiety/Depression, ASD = Autism Spectrum Disorder, CU = Callous-unemotional.