Parameters of linear regression between the measurement (susceptibility or R2*) and PMA in the ROIs showing significant associations (P < .0011)
| Measurement = A × PMA + B | |||||
|---|---|---|---|---|---|
| Measurement | ROI | A (ppb or Hz/week) | B (ppb or Hz) | P | r |
| χ+ | Putamen | 0.464 | –8.0 | <.0001 | 0.459 |
| Globus pallidus | 0.527 | –10.0 | .0008 | 0.405 | |
| χ– | Putamen | –0.390 | 4.8 | <.0001 | –0.433 |
| R2* | Putamen | 0.177 | 1.9 | <.0001 | 0.515 |
Note:—ppb indicates parts per billion.