Table 1. Group characteristics (ANOVA test statistics).
| Group | TDs (n = 15) | ADHD-C (n = 16) | ADHD-I(n = 15) | F value (ANOVA) | p value (ANOVA) | p value (ADHD-I v.s. ADHD-C) | p value (ADHD-I v.s. TD) | p value (ADHD-C v.s. TD) |
| Gender (M/F) | 11/4 | 13/3 | 14/1 | ns(Fisher's exact test) | ||||
| Age (yrs) | 10.47(2.53) | 9.50(2.34) | 8.87(1.51) | 1.878 | ns | |||
| IQ score | 119.07(12.72) | 102.53(11.27) | 104.50(15.23) | 7.053 | 0.002 | 0.639 | 0.005 | 0.001 |
| SNAP-IV | ||||||||
| Total score | 14.64(2.65) | 31.38(6.82) | 20.07(3.67) | 47.52 | <0.001 | <0.001 | 0.03 | <0.001 |
| Inattentionitem score | 7.47(1.68) | 16.56(4.27) | 14.67(2.72) | 46.83 | <0.001 | 0.095 | <0.001 | <0.001 |
| Hyperactivity/Impulsive item score | 7.00(1.46) | 14.81(3.39) | 5.40(2.47) | 59.20 | <0.001 | <0.001 | 0.098 | <0.001 |
| Child Behavior Checklist | ||||||||
| total problems | 34.99(11.00) | 63.22(22.57) | 48.01(9.20) | 12.66 | <0.001 | 0.01 | 0.028 | <0.001 |
| Inattention item score | 3.07(2.49) | 8.31(3.55) | 6.27(2.87) | 11.84 | <0.001 | 0.235 | 0.009 | <0.001 |
| internalizing problems | 2.60(1.84) | 8.31(5.77) | 5.13(3.34) | 7.78 | 0.001 | 0.034 | 0.093 | <0.001 |
| externalizing problems | 3.47(2.70) | 16.87(10.56) | 10.07(8.90) | 13.67 | <0.001 | 0.091 | 0.001 | <0.001 |
Note: TD = Typically developing, SNAP-IV = The Swanson, Nolan and Pelham Rating Scale; CBCL = The Child Behavior Checklist; IQ = Intelligence Quotient.