Table 1.
Characteristics and task performance.
| ASDs (n = 21) |
ADHD (n = 19) |
HC (n = 21) |
Comparison |
||||
|---|---|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Mean (SD) | P | Post-hoc P |
|||
| ASDs:HC | ADHD:HC | ASDs:ADHD | |||||
| Age, years | 30.8 (7.2) | 30.6 (7.4) | 28.8 (5.5) | 0.60 | |||
| Sex, men/women | 8 13 | 11 8 | 13 8 | 0.26 | |||
| IQ | 105.1 (14.6) | 102.6 (16.6) | 109.0 (5.6) | 0.25 | |||
| SST (all trials), % | 80.8 (11.6) | 78.9 (13.8) | 84.9 (9.3) | 0.26 | |||
| SST (stop trials), % | 49.2 (38.4) | 56.1 (26.3) | 65.6 (23.6) | 0.22 | |||
| SST (go trials), % | 94.3 (7.2) | 87.7 (20.2) | 92.7 (9.8) | 0.27 | |||
| MRT (SST), ms | 498.0 (102.7) | 539.1 (100.4) | 558.1 (75.8) | 0.11 | |||
| VFT, words | 16.0 (4.3) | 15.5 (4.5) | 16.9 (4.4) | 0.60 | |||
| ASRS | 3.2 (1.8) | 5.2 (0.8) | 1.3 (1.1) | < 0.01 | < 0.01 | < 0.01 | < 0.01 |
| WURS | 53.1 (23.2) | 62.1 (20.0) | 17.5 (9.3) | < 0.01 | < 0.01 | < 0.01 | 0.39 |
| AQ total score | 33.5 (7.9) | 27.6 (5.5) | 13.4 (4.2) | < 0.01 | < 0.01 | < 0.01 | 0.02 |
| GAF | 51.8 (13.2) | 58.8 (10.7) | 84.6 (3.1) | < 0.01 | < 0.01 | < 0.01 | 0.45 |
| Subtype | Asperger, 5; PDD NOS, 16 | ADHD, 11; ADD, 8 | |||||
ASDs, autism spectrum disorders; ADHD, attention deficit hyperactivity disorder; HC, healthy control subjects; Asperger, Asperger syndrome; PDD, pervasive developmental disorder; NOS, pervasive developmental disorder - not otherwise specified; IQ, intelligence quotient; SST, stop signal task; MRT, mean reaction time; VFT, verbal fluency task; ASRS, The World Health Organization (WHO) Adult ADHD Inhibitory-Report Scale; WURS, Wender Utah Rating Scale; AQ, autism spectrum quotient; GAF, Global Assessment of Functioning.