Table 2.
Group comparisons.
| A. MFC (s-2) |
Control group (n = 29) |
ADHD group (n = 30) |
Group comparison |
||
|---|---|---|---|---|---|
| Region | Mean (SD) | Mean (SD) | Statistic | p-Value | Effect size |
| GP | 579.4 (204.6) | 546.7 (159.2) | t = 0.7 | 0.495 | d = 0.2; small |
| PUT | 242.9 (92.7) | 244.3 (74.8) | t = −0.1 | 0.950 | d = 0.0; small |
| CN | 284.1 (88.8) | 285.1 (88.2) | U = 422 | 0.851 | rrb = 0.0; small |
| THL | 143.5 (36.8) | 153.6 (36.4) | U = 342 | 0.162 | rrb = 0.2; small |
| RN | 230.9 (77.6) | 243.1 (121.1) | U = 423 | 0.863 | rrb = 0.0; small |
| B. R2* (s-1) |
Control group (n = 23) |
ADHD group (n = 23) |
Group comparison |
||
|---|---|---|---|---|---|
| Region | Mean (SD) | Mean (SD) | Statistic | p-Value | Effect size |
| GP | 31.0 (3.6) | 31.0 (3.3) | t = 0.1 | 0.957 | d = 0.0; small |
| PUT | 19.5 (2.3) | 19.9 (1.7) | t = −0.6 | 0.550 | d = 0.2; small |
| CN | 18.4 (1.6) | 19.4 (2.7) | U = 214 | 0.275 | rrb = 0.2; small |
| THL | 18.7 (1.3) | 18.7 (1.3) | U = 241 | 0.617 | rrb = 0.1; small |
| RN | 23.8 (4.0) | 23.5(3.3) | U = 248 | 0.728 | rrb = 0.1; small |
GP: globus pallidus; PUT: putamen; CN: caudate nucleus; THL: thalamus; RN: red nucleus; t: Student's t-test (two-tailed); U: Mann-Whitney U test (Exact Sig. two-tailed); SD: standard deviation; d: Cohen's d; rrb: rank biserial correlation.