Table 1a.
Mean (±SD) iron measure in each coronal region for FDRI and SWI; t-tests (df=21) compare young vs. elderly groups
| FDRI |
SWI_64 |
SWI_96 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Region | Young (N=11) | Elderly (N=12) | Young (N=11) | Elderly (N=12) | Young (N=11) | Elderly (N=12) | ||||||
| Frontal WM | 2.070 | 1.592 | t= | 1.867 | 0.004 | −0.004 | t= | 1.225 | 0.004 | 0.001 | t= | 1.735 |
| (0.612) | (0.614) | p= | .076 | (0.014) | (0.011) | p= | .234 | (0.004) | (0.006) | p= | .097 | |
| Thalamus | 2.375 | 1.810 | t= | 2.071 | 0.004 | 0.007 | t= | 0.692 | 0.001 | 0.001 | t= | 0.312 |
| (0.637) | (0.667) | p= | .051 | (0.014) | (0.007) | p= | .496 | (0.009) | (0.004) | p= | .758 | |
| Caudate | 2.542 | 2.983 | t= | 1.316 | −0.026 | −0.031 | t= | 0.299 | −0.011 | −0.010 | t= | 0.157 |
| (0.388) | (1.045) | p= | .202 | (0.026) | (0.044) | p= | .767 | (0.016) | (0.026) | p= | .876 | |
| Putamen | 2.893 | 3.971 | t= | 4.150 | 0.000 | −0.064 | t= | 3.987 | −0.004 | −0.051 | t= | 4.591 |
| (0.414) | (0.764) | p= | .001 | (0.012) | (0.052) | p= | .001 | (0.006) | (0.033) | p= | .000 | |
| Globus pallidus | 4.898 | 5.540 | t= | 1.942 | 0.005 | 0.087 | t= | 3.066† | 0.016 | 0.049 | t= | 2.318† |
| (0.436) | (1.012) | p= | .066 | (0.060) | (0.068) | p= | .005 | (0.018) | (0.043) | p= | .031 | |
| S nigra | 3.148 | 3.961 | t= | 2.032 | 0.045 | 0.072 | t= | 0.695 | 0.022 | 0.047 | t= | 0.976 |
| (0.954) | (0.961) | p= | .055 | (0.052) | (0.117) | p= | .494 | (0.032) | (0.082) | p= | .340 | |
| Red nucleus | 3.131 | 3.990 | t= | 2.507 | 0.001 | 0.051 | t= | 3.092† | −0.009 | 0.019 | t= | 2.258† |
| (0.879) | (0.763) | p= | .021 | (0.030) | (0.045) | p= | .005 | (0.022) | (0.035) | p= | .034 | |
†
Group difference is in the unexpected direction, with elderly having less iron than young.
Numbers in bold indicate significant differences.