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. Author manuscript; available in PMC: 2022 Dec 1.
Published in final edited form as: Am J Geriatr Psychiatry. 2021 Jan 23;29(12):1188–1198. doi: 10.1016/j.jagp.2021.01.004

Table 2. Associations between fractional anisotropy (FA) and baseline neurocognitive function.

Clusters in which FA was significantly positively associated with executive function as measured by the I/P subscale of the DRS.

Cluster size (Voxels) MIN p valuea Max T Mean T (SD) MAX X (mm) MAX Y (mm) MAX Z (mm) Major tractsb
3336 0.019 5.276 2.281 (0.704) 35 −41 31 SLF (Right), SLF-temporal (Right), CST (Right)
376 0.034 5.028 3.099 (0.673) −37 −38 30 SLF (Left), SLF-temporal (Left)
a

Threshold-free cluster enhancement, family-wise error-corrected p<0.05, df= 69

b

Johns Hopkins University White-Matter Tractography Atlas (30)

Abbreviations: I/P subscale of DRS: Initiation/Perseveration subscale of the Dementia Rating Scale, CST: corticospinal tract, SLF: superior longitudinal fasciculus, SLF-temporal: superior longitudinal fasciculus temporal, Left: left hemisphere, Right: right hemisphere.

Notes: Voxels: the number of voxels in each cluster. MIN p value: the value of the minimum p value within the cluster. Max T: the value of the maximum t value within the cluster. Mean T (SD): the value of the mean (standard deviation) t value within the cluster. MAX X/Y/Z (mm): the location of the voxel with minimum p value in the standard space coordinates (mm).