Table 2.
Childhood and Adolescent/Young Adult Characteristics of ADHD Persisters and Partial Remitters
| Measure | ADHD-persisters (n=38) Mean (SD) | ADHD-partial remitters (n=29) Mean (SD) | t | Cohen’s d |
|---|---|---|---|---|
| Childhood Assessment | ||||
| Age (years) | 8.75 (1.23) | 9.54 (1.07) | 2.77** | 0.69 |
| WISC-III Full-Scale IQ | 93.08 (14.41) | 96.11 (13.17) | 0.39 | 0.22 |
| IOWA Conners I/O Score | 11.30 (3.43) | 11.04 (3.01) | 0.32 | 0.08 |
| CBCL Attention Probs | 71.06 (10.80) | 71.44 (10.70) | 0.14 | 0.04 |
| Adolescent Assessment | ||||
| Age (years) | 18.12 (2.01) | 18.93(1.17) | 1.96 | 0.49 |
| Child to Adolescent Interval | 9.35 (1.84) | 9.41 (1.59) | 0.15 | 0.04 |
| SES | 39.24 (15.88) | 49.31 (17.65) | 2.45* | 0.60 |
| WAIS-III Full-Scale IQ | 90.61 (12.63) | 96.03 (15.02) | 1.61 | 0.39 |
| Parent Report | ||||
| DSM-IV Inattention | 17.89 (5.63) | 9.22 (6.40) | 5.75** | 1.44 |
| DSM-IV Hyper.-Impuls. | 13.41 (8.00) | 4.67 (5.93) | 4.79** | 1.24 |
| CBCL Attention Probs. | 65.30 (12.40) | 55.15 (5.91) | 3.94** | 1.05 |
| Adolescent Self Report | ||||
| DSM-IV Inattention | 12.44 (6.37) | 6.25 (4.63) | 4.33** | 1.11 |
| DSM-IV Hyper.-Impuls. | 11.06 (7.55) | 3.39 (3.99) | 4.87** | 1.27 |
| YSR Attention problems | 58.33 (9.83) | 53.50 (7.90) | 2.04* | 0.54 |
Note:
*
p < 0.05;
**
p < 0.001.
Severity of ADHD symptoms was determined dimensionally by self- and parent-ratings on a 4-point scale made-up of all 18 DSM-IV Inattentive and Hyperactive-Impulsive items. IOWA Conners I/O Score refers to the raw score on the Inattentive/Overactive subscale of the IOWA Conners Rating Scale.