Comparisons of demographic variables and scales
| Variable | ADHD (n=19) | Control (n=20) | t or U | p |
|---|---|---|---|---|
| Sex, male | 14 | 11 | 0.38 |
0.378 |
| Age (yr) | 13.47±0.90 | 13.35±1.18 | 0.50† | 0.618 |
| IQ | 113.84±11.47 | 110.70±15.17 | 0.73 | 0.471 |
| ADHD Rating Scale | 25.21±10.27 | 6.25±7.97 | 4.58† | 4.67E-06 |
| Inattentiveness | 15.42±4.72 | 3.95±4.67 | 4.70† | 2.58E-06 |
| Hyperactivity | 9.79±6.08 | 2.30±3.50 | 3.98† | 6.82E-05 |
| Empathy Quotient | 21.32±7.06 | 26.95±8.44 | -2.26 | 0.030 |
| Cognitive empathy | 8.37±3.74 | 11.45±3.90 | -2.52 | 0.016 |
| Emotional empathy | 7.95±4.24 | 9.10±3.80 | -0.90 | 0.376 |
| Interpersonal Reactivity Index | 47.42±14.99 | 55.25±11.55 | -1.83 | 0.075 |
| Fantasy | 17.21±6.31 | 18.90±4.30 | -0.98 | 0.333 |
| Perspective taking | 13.68±5.23 | 17.05±4.77 | -2.10 | 0.043 |
| Empathic concern | 16.53±6.27 | 19.30±4.54 | -1.59 | 0.121 |
Data are presented as mean± standard deviation or n. t-value from Student t-test or U-value from Mann-Whitney test. *chisquare test, † Mann-Whitney test. ADHD, attention-deficit/hyperactivity disorder