Table 1.
Baseline demographic and clinical characteristics of the participants in the ABCD study (n=11,721)
| Mean | SD | |
|---|---|---|
| Age (years) | 9.91 | 0.62 |
| Total cognition score | 47.71 | 11.21 |
| Parental education (years) | 16.6 | 2.8 |
| N | % | |
| Male | 6,118 | 52.2 |
| Race/ethnicity | ||
| Caucasian | 6,108 | 52.1 |
| Black | 1,753 | 15.0 |
| Hispanic | 2,360 | 20.1 |
| Asian | 250 | 2.1 |
| Other | 1,230 | 10.5 |
| Lifetime indicators of psychopathology | ||
| Major Depressive Disorder | 318 | 2.7 |
| Generalized Anxiety Disorder | 510 | 4.3 |
| Panic Disorder | 32 | 0.3 |
| Separation Anxiety | 1,049 | 8.8 |
| Social Anxiety Disorder | 547 | 4.6 |
| Hallucinations | 55 | 0.5 |
| Delusions | 216 | 1.8 |
| Attention Deficit Hyperactivity | 2,429 | 20.5 |
| Oppositional Defiant Disorder | 1,667 | 14.0 |
| Conduct Disorder | 374 | 3.1 |
| Obsessive-Compulsive Disorder | 1,099 | 9.3 |
| Bipolar Disorder (Unspecified) | 429 | 3.6 |
| Post-Traumatic Stress Disorder | 231 | 1.9 |
| Specific Phobia | 3 133 | 26 4 |
Note: Cognition scores ascertained from fully corrected total cognition t-score from the NIH toolbox