Table 1.
Demographic and clinical variables of ADHD and healthy controls
| ADHD (N=36) | Controls (N=36) | t/χ2 | p | |
|---|---|---|---|---|
| Sex (male/female) | 28/8 | 28/8 | < 0.01 | >0.999 |
| Age in year (mean±SD) | 10.5±1.8 | 10.5±1.6 | 0.14 | 0.891 |
| FSIQ (mean±SD) | 105.4±14.6 | 117.5±15.1 | -3.46 | 0.001 |
| ADHD subtype (N, %) | ||||
| Inattentive type | 19 (52.8) | NA | ||
| Combined | 16 (44.4) | NA | ||
| Hyperactive-impulsive type | 1 (2.8) | NA | ||
| Digit span test (mean±SD) | ||||
| DSB score | 4.64±1.31 | 5.57±1.58 | 11.64 | 0.001 |
| DS score | 10.92±2.66 | 13.20±3.08 | 14.12 | 3.62×10-4 |
ADHD: attention-deficit/hyperactivity disorder, SD: standard devision, FSIQ: full-scale intelligence quotient, NA: not applicable, DSB: digit span backward, DS: digit span