Table 1. Demographic and Clinical Characteristics of the Participants.
| Persistent ADHD N=32 | Remitted ADHD N=43 | Never-affected comparison N=74 | ||
|---|---|---|---|---|
| Age (years) at assessment: mean (SD) | 23.3 (3.7) | 24.1 (3.9) | 24 (3.3) | F(2,146)=0.51, p=0.61 |
| IQ: mean (SD) | 111 (12) | 114 (14) | 113 (11) | F(2,127)=0.89, p=0.41 |
| Sex: males; females | 13; 19 | 26; 17 | 44; 30 | X(2)2=3.77, p=0.15 |
| Symptoms, mean number (SD) | ||||
| Inattention | 5.7 (1.9) | 1.8 (1.4) | NA | t(73)=10.5, p<0.0001 |
| Hyperactivity–impulsivity | 4.3 (2.5) | 1.5 (1.4) | NA | t(73)=6.0, p<0.0001 |
| Comorbidity | ||||
| Any comorbidity | 9 (28%) | 5 (11%) | N/A | Any comorbidity vs none, Fisher's exact test p=0.08 |
| Depression | 4 | 1 | ||
| Dysthymia | 1 | 1 | ||
| GAD/panic disorder | 2 | 2 | ||
| Anxiety NOS | 2 | 2 | ||
| Psychostimulant treatment | ||||
| Taking psychostimulant medication | 16 (50%) | 2 (5%) | N/A | Fisher's exact test p<0.0001 |
Abbreviations: GAD, Generalized anxiety disorder; NOS, not otherwise specified.
Missing data are indicated in the degrees of freedom.