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Summary of brainstem NM and iron CR and nVol behavior among PD subgroups in reference to the HC.
| Sequence | Region | Parameter | HC | iPD | LRRK2-PD |
|---|---|---|---|---|---|
| NM | SNc | CR | — |  |
 |
| nVol | — |  |
 |
||
| LC | CR | — |  |
— | |
| nVol | — |  |
— | ||
| Iron | SNc | CR | — |  |
 |
| nVol | — |  |
 |
||
| RN | CR | — | — | — | |
| nVol | — | — | — |
Single black arrows indicate statistically significant differences (p < 0.05, d < 0.8), double black arrows indicate statistically significant differences with large effect size (p < 0.05, d ≥ 0.8), and white arrows indicate statistical trends.
