Table 1:
Demographic and diagnostic information by group
| Group |
||||||
|---|---|---|---|---|---|---|
| Control (n = 33) |
ADHD (n = 38) |
|||||
| Mean | SD | Mean | SD | t | d | |
| Demographic | ||||||
| Age | 22.1 | 1.7 | 21.3 | 1.7 | 1.8 | 0.43 |
| Education | 14.9 | 1.6 | 15.1 | 1.1 | 0.6 | 0.14 |
| IQ: Verbal | 106.7 | 6.7 | 104.5 | 11.0 | 1.1 | 0.26 |
| IQ: Nonverbal | 110.4 | 8.4 | 107.3 | 8.4 | 1.8 | 0.43 |
| IQ: Composite | 109.5 | 6.7 | 106.6 | 9.2 | 1.7 | 0.41 |
| Diagnostic | ||||||
| CAARS | ||||||
| DSM-IA | 51.0 | 11.1 | 74.6 | 11.2 | 8.1*** | 2.18 |
| DSM-HI | 46.4 | 9.7 | 63.9 | 14.3 | 5.5*** | 1.48 |
| DSM-Tot | 49.0 | 11.4 | 72.6 | 11.1 | 8.0*** | 2.16 |
| DSM | 2.4 | 2.9 | 8.7 | 4.0 | 7.4*** | 1.78 |
| AASRS | 8.1 | 5.6 | 19.9 | 6.3 | 8.3*** | 2.00 |
Note. Group contrasts were tests by independent sample t tests. For comparisons involving CAARS variables, n = 57, df = 55. For all other comparisons, n = 71, df = 69. Age is reported in years. Education refers to years of 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.
***
p < .001.