Table 1.
Clinical and demographic variables for child and parent samples
| Children | Parents | ||
|---|---|---|---|
| Sample size (N) | 340 | 191 | |
| Age in years (mean, SD) | 11.07 (3.4) | 44.3 (5.5) | |
| Gender, Males (N, %) | 195 (57%) | 96 (50%) | |
| DRD4 status -7R/ not 7 | 65/144 | 43/116 | |
|
Psychiatric diagnoses (lifetime) | |||
| ADHD | 304 (88%) | 80 (42%) | |
| Combined Type | 174 (51%) | 26 (14%) | |
| Inattentive type | 117 (34%) | 47 (25%) | |
| Hyperactive-Impulsive type | 13 (4%) | 7 (3%) | |
| Anxiety | 58 (17%) | 35 (18%) | |
| Mood | 50 (15%) | 82 (43%) | |
| ODD/CD | 134 (39%) | 21 (11%) | |
| Family level variables | |||
| N_families | 132 | ||
| SES (1=lowest, 5=highest) | 3.5 (1.8) | ||
| Ethnicity | |||
| Caucasian/non-Hispanic | 72% | ||
| Caucasian/Hispanic | 8% | ||
| African-American | 3% | ||
| Other, Mixed | 13% | ||
Note. DRD4=Dopamine Receptor D4 gene, 7R=7-repeat allele, ADHD=Attention-Deficit Hyperactivity Disorder, ODD=Oppositional Defiant Disorder,CD= Conduct Disorder, SES=Socioeconomic Status using Hollingshead scale