Table 3.
Correlations with age and psychostimulant medication duration.
| Iron index | Control group |
ADHD group |
|||
|---|---|---|---|---|---|
| vs. Age | vs. Rx Duration | vs. Age | vs. Rx Duration (control for Age)a | vs. Age (control for Rx Duration)a | |
| A. MFC (s-2) | (n = 29) | (n = 30) | |||
| Region | rs (p-value) | r (p-value) | r (p-value) | r (p-value) | r (p-value) |
| GP | 0.76 (<0.001)⁎ | 0.60 (<0.001)⁎ | 0.44 (0.007)⁎ | 0.45 (0.007)⁎ | 0.07 (0.362) |
| PUT | 0.72 (<0.001)⁎ | 0.55 (0.001)⁎ | 0.45 (0.006)⁎ | 0.38 (0.021)⁎ | 0.13 (0.257) |
| CN | 0.80 (<0.001)⁎ | 0.45 (0.006)⁎ | 0.43 (0.009)⁎ | 0.25 (0.098) | 0.19 (0.167) |
| THL | 0.77 (<0.001)⁎ | rs = 0.33 (0.040)⁎ | rs = 0.05 (0.398) | rs = 0.37 (0.025)⁎ | rs = −0.19 (0.163) |
| RN | 0.59 (<0.001)⁎ | rs = 0.26 (0.083) | rs = 0.24 (0.103) | rs = 0.15 (0.216) | rs = 0.11 (0.290) |
| B. R2⁎ (s-1) | (n = 23) | (n = 23) | |||
| Region | rs (p-value) | r (p-value) | r (p-value) | r (p-value) | r (p-value) |
| GP | 0.80 (<0.001)⁎ | 0.54 (0.004)⁎ | 0.36 (0.048)# | 0.44 (0.018)⁎ | 0.07 (0.385) |
| PUT | 0.60 (0.001)⁎ | 0.66 (<0.001)⁎ | 0.43 (0.021)# | 0.56 (0.003)⁎ | 0.08 (0.365) |
| CN | 0.54 (0.004)⁎ | rs = 0.54 (0.004)⁎ | rs = 0.32 (0.071) | rs = 0.46 (0.015)⁎ | rs = 0.02 (0.473) |
| THL | 0.58 (0.002)⁎ | rs = −0.18 (0.203) | rs = −0.08 (0.360) | rs = −0.17 (0.229) | rs = 0.03 (0.448) |
| RN | 0.47 (0.012)⁎ | rs = −0.13 (0.283) | rs = 0.18 (0.201) | rs = −0.29 (0.100) | rs = 0.31 (0.078) |
GP: globus pallidus; PUT: putamen; CN: caudate nucleus; THL: thalamus; RN: red nucleus; Rx: psychostimulant medication; r: Pearson's correlation; rs: Spearman's correlation.
a
Partial correlations.
⁎
p < .05, one-tailed (false discovery rate corrected).
#
p < .05, one-tailed.