Table 1.
Clinical and demographic characteristics of participants.
| Group | |||||||
|---|---|---|---|---|---|---|---|
| ADHD (SD) | Control (SD) | Test statistic | d.f. | p Value | |||
| Gender | M=24 | F=1 | M=23 | F=1 | 0.98 | 1 | n/s |
| Age (months) | 151.92 | (21.31) | 155.21 | (19.38) | 0.56 | 47 | .575 |
| Weight (kg) | 43.96 | (15.50) | 51.17 | (13.64) | 1.73 | 47 | .091 |
| Medication (mg/kg) | 1.07 | (0.43) | 0 | 0 | 47 | n/a | |
| FSIQ | 91.36 | (11.04) | 104.79 | (14.48) | 3.66 | 47 | .001 |
| Total digit span scaled | 8.12 | (3.35) | 9.58 | (3.34) | 1.53 | 47 | .132 |
| TOWRE: total score | 88.96 | (21.94) | 98.33 | (14.96) | 1.74 | 47 | .088 |
| Conners Parent DSM total | 82.24 | (7.52) | 43.83 | (3.37) | 23.22 | 47 | .000 |
| SES classification (n) | 0.98 | 3 | .806 | ||||
| Higher professional | 1 | 1 | n/s | ||||
| Lower professional | 5 | 5 | n/s | ||||
| Self-employed | 1 | 0 | n/s | ||||
| Manual/unemployed | 18 | 18 | n/s | ||||
| Co-morbid diagnoses | |||||||
| ODD | 12 | 0 | n/a | ||||
| CD | 6 | 0 | n/a | ||||
| DCD | 1 | 0 | n/a | ||||
| RD | 1 | 0 | n/a | ||||
| GAD | 4 | 0 | n/a | ||||
| Specific phobia | 4 | 0 | n/a | ||||
| Eating disorder | 1 | 0 | n/a |
Note : Some participants had more than one comorbidity. ADHD=attention-deficit/hyperactivity disorder; CD=conduct disorder; DCD=developmental coordination disorder; DSM=Diagnostic and Statistical Manual of Mental Disorders; FSIQ=full-scale intelligence quotient; GAD=generalised anxiety disorder; ODD=oppositional defiant disorder; RD=reading disorder; SES=socioeconomic status; TOWRE=Test of Word Reading Efficiency.