Table 1.
Demographic and descriptive statistics.
| Control | ADHD | p | |
|---|---|---|---|
| N | 384 | 389 | |
| % Male | 45.6 | 66.3 | <.001 |
| % Caucasian | 74.2 | 72.8 | .65 |
| % African-American | 13.0 | 8.6 | .06 |
| % Latino | 4.4 | 6.6 | .17 |
| % Multi-ethnic | 6.0 | 9.9 | .04 |
| Age | 12.8 (2.9) | 11.9 (3.0) | .001 |
| Income+ | 73.4 (50.0) | 60.4 (36.0) | <.001 |
| Inattention Sx | 1.5 (1.4) | 6.9 (2.8) | <.001 |
| Hyperactivity Sx | .96 (1.2) | 3.8 (3.1) | <.001 |
| % ODD | 12.1 | 41.7 | <.001 |
| % CD | 2.1 | 9.3 | <.001 |
| % Mood Disorder | 8.8 | 18.2 | <.001 |
| % Anxiety Disorder | 14.5 | 24.0 | <.001 |
| % Learning Disorder | 4.7 | 18.1 | <.001 |
| Birth Weight (g) | 3443.1 (590.2) | 3352.7 (520.3) | <.001 |
| % Prenatal Tobacco Exposure | 4.0 | 15.4 | <.001 |
| % Prenatal Alcohol Exposure | 7.1 | 9.9 | .12 |
| Maternal Age at Birth | 29.1 (5.2) | 28.5 (5.9) | .18 |
| Paternal Age at Birth | 31.8 (6.0) | 30.3 (6.3) | .03 |
Note. ODD=oppositional defiant disorder, CD=conduct disorder. Birth weight reported in grams. +Income reported in thousands. % anxiety disorder indicated presence of any or multiple anxiety disorders.