Table 2.
Associations Between Iron and MRI Measurements
| Unexposed Workers |
Exposed Workers |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Iron |
TIBC |
Transferrin |
R2* |
Iron |
TIBC |
Transferrin |
R2* |
|||||||||
| r | p value | r | p value | r | p value | r | p value | r | p value | r | p value | r | p value | r | p value | |
| R2* | −0.04 | 0.826 | 0.04 | 0.844 | −0.04 | 0.829 | — | — | −0.20 | 0.352 | 0.17 | 0.420 | −0.26 | 0.213 | — | — |
| FA | −0.14 | 0.412 | −0.05 | 0.783 | −0.15 | 0.376 | −0.08 | 0.710 | 0.49 | 0.014 | 0.16 | 0.440 | 0.38 | 0.063 | 0.00 | 0.981 |
| MD | −0.15 | 0.378 | 0.18 | 0.285 | −0.14 | 0.388 | −0.13 | 0.454 | −0.11 | 0.604 | 0.09 | 0.684 | −0.11 | 0.611 | −0.16 | 0.352 |
Pearson correlation coefficients between age-regressed residuals for serum iron panel measurements, substantia nigra pars compacta (SNc) transverse relaxation rate (R2*), and SNc diffusion tensor imaging (DTI) scalars of fractional anisotropy (FA) and mean diffusivity (MD), among paraquat-exposed and unexposed workers. Abbreviation: TIBC, total iron-binding capacity.