Table 1.
Demographic characteristics
| ADHDa | Comparisonb | p | |
|---|---|---|---|
| IQ (M, SD) | 101.8 (15.9) | 111.4 (13.9) | < .01 |
| Age at 1st assessment (M, SD) | 17.6 (3.3) | 17.1 (3.2) | ns |
| Baseline Diagnostic Severity (M, SD) | |||
| ADHD | 2.28 (.43) | N/A | |
| ODD | 1.87 (.66) | N/A | |
| CD | 0.45 (.31) | N/A | |
| Total Family Income (M, SD) | 61,6821 (47,261) | 72,310 (48,809) | < .05 |
| Parent Education | < .01 | ||
| High school grad/GED | 13.0 | 8.6 | |
| Partial college/specialized training(%) | 43.0 | 30.0 | |
| College or university degree (%) | 22.3 | 27.1 | |
| Graduate Professional degree (%) | 21.7 | 34.3 | |
| Ethnicity | ns | ||
| Caucasian (%) | 80.4 | 85.4 | |
| African-American (%) | 12.3 | 8.0 | |
| Other (%) | 7.3 | 6.6 | |
Note. ns = not significant at p ≤ .05; Baseline diagnostic severity score is the higher score reported by either parent or teacher on the DBD rating scale, calculated by taking the average symptom level on a scale from 0 “not at all present” to 3 “very much present”.
a
n ranges from 315 to 326, except for family income (n = 265).
b
n ranges from 210 to 213, except for family income (n = 186).