Table 1.
Demographic and diagnostic information by group
| Group |
|||||
|---|---|---|---|---|---|
| Control (n = 27) |
ADHD (n = 30) |
||||
| Mean | SD | Mean | SD | t | |
| Demographic | |||||
| Age | 22.1 | 1.7 | 21.1 | 1.7 | 2.2* |
| Education | 15.3 | 1.3 | 15.1 | 1.0 | 0.7 |
| IQ: Verbal | 107.1 | 6.9 | 103.2 | 10.8 | 1.6 |
| IQ: Nonverbal | 111.2 | 8.8 | 105.6 | 9.8 | 2.2* |
| IQ: Composite | 110.1 | 6.9 | 104.9 | 10.1 | 2.3* |
| Diagnostic | |||||
| CAARS | |||||
| DSM-IA | 51.0 | 11.1 | 75.9 | 11.5 | 8.3*** |
| DSM-HI | 46.4 | 9.7 | 64.8 | 14.8 | 5.5*** |
| DSM-Tot | 49.0 | 11.4 | 73.7 | 11.8 | 5.6*** |
| Index | 45.1 | 8.4 | 59.1 | 10.1 | 8.0*** |
| DSM | 0.9 | 1.3 | 5.4 | 2.1 | 9.7*** |
| AASRS | 8.1 | 5.6 | 21.4 | 5.8 | 8.8*** |
| BIS | 52.6 | 8.5 | 68.5 | 9.9 | 6.5*** |
Note. Group contrasts were tests by independent sample t tests. For all comparisons, n = 57, df = 55. Age is reported in years. Education refers to years education completed. IQ: Verbal, IQ: Nonverbal, and IQ: Composite refers to respective scaled scores of the Kaufman Brief Intelligence Test. CAARS scores are T-scores; DSM-IA is DSM-IV Inattentive Symptoms, DSM-HI is DSM-IV Hyperactive-Impulsive Symptoms; DSM-Tot is DSM-IV ADHD Symptoms Total; and Index is ADHD Index. DSM refers to symptom count on the ADHD symptoms checklist. AASRS refers to total score on the ADD/H Adolescent Self-Report Scale—Short Form. BIS refers to the total score on the Barratt Impulsiveness Scale.
*
p < .05,
***
p < .001.