Spearman correlation (r) between CTP variables and age-related white matter change scale MRI score
| CTP Variables | MRI Score | r (P value) | |
|---|---|---|---|
| Blood Flow (n = 35) | Periventricular WM | −0.55 | (<.01) |
| Subcortical WM | −0.50 | (<.01) | |
| Average WM | −0.55 | (<.01) | |
| Average GM | −0.43 | (<.01) | |
| Blood volume (n = 35) | Periventricular WM | −0.23 | (.18) |
| Subcortical WM | −0.050 | (.78) | |
| Average WM | −0.15 | (.39) | |
| Average GM | 0.024 | (0.89) | |
| MTT (n = 35) | Periventricular WM | 0.45 | (<.01) |
| Subcortical WM | 0.43 | (<.01) | |
| Average WM | 0.31 | (.07) | |
| Average GM | 0.37 | (.03) | |
| PS product (n = 16) | Periventricular WM | −0.20 | (.46) |
| Subcortical WM | −0.22 | (.41) | |
| Average WM | −0.01 | (.9) |
Note:—MRI indicates MR imaging; WM, white matter; GM, gray matter; PS, permeability surface product; MTT, mean transit time; CTP, CT perfusion.