Table 1.
Demographic and Baseline Characteristics by Group
| ADHD (n = 335) | No ADHD (n = 208) | t(df) | p | |
|---|---|---|---|---|
| At time of 8 year Assessment | ||||
| M (SD) | ||||
| Age | 16.71 (0.95) | 16.55 (1.18) | 1.67 (370) | .10 |
| Grade (up to 12) | 10.43 (1.02) n = 310 | 10.44 (1.11) n = 193 | −0.08 (501) | .93 |
|
At Baseline (%) | ||||
| Boys | 77.3% | 78.9% | 0.18 (1) | .68 |
| Race/Ethnicity | ||||
| White | 65.4% | 69.7% | 1.09 (1) | .30 |
| Nonwhite | 34.6% | 30.3% | ||
| Welfare | 15.5% | 8.7% | 5.30 (1) | .02 |
| Treatment Group Assignment | ||||
| Community Care | 23.6% | |||
| Combined | 26.3% | |||
| Medication Management | 22.4% | |||
| Behavioral | 27.8% | |||
| M (SD) | ||||
| Age biological mothera | 28.00 (5.84) n = 323 | 29.31 (5.67) n = 205 | −2.53 (526) | .01 |
| Mother years educationb | 14.61 (2.13) n = 332 | 14.89 (2.10) n = 206 | −1.42 (536) | .16 |
| WISC-III IQ estimate | 101.7 (14.23) n = 333 | 110.7 (17.78) n = 205 | −6.12 (362.03) | <.01 |
Note. Satterthwaite method used due to unequal variances. n indicated when varies due to missing data.
a
Calculated from age at the child's birth.
b
No differences were found between groups in father years of education or maximum education.