Table 3.
Factor Loadings and Variance Calculated by Factor from the Early Imaging DTI Metrics
| Factor 1 “cortical diffusivity” | Factor 2 “subcortical diffusivity” | Factor 3 “FA” | Factor 4 “thalamus diffusivity” | Factor 5 “corpus callosum” | Factor 6 “thalamus FA” | |
|---|---|---|---|---|---|---|
| TI measure | ||||||
| ALIC/basal ganglia FA | 0.784 | |||||
| ALIC/Basal ganglia ADC | 0.700 | |||||
| ALIC/Basal ganglia AD | 0.694 | |||||
| ALIC/Basal ganglia RD | 0.648 | |||||
| Brainstem FA | ||||||
| Brainstem ADC | 0.754 | |||||
| Brainstem AD | 0.777 | |||||
| Brainstem RD | 0.606 | |||||
| Corpus callosum FA | -0.906 | |||||
| Corpus callosum ADC | 0.877 | |||||
| Corpus callosum AD | 0.849 | |||||
| Corpus callosum RD | 0.840 | |||||
| Frontal white matter FA | 0.849 | |||||
| Frontal white matter ADC | 0.766 | |||||
| Frontal white matter AD | 0.719 | |||||
| Frontal white matter RD | 0.775 | |||||
| Occipital white matter FA | 0.851 | |||||
| Occipital white matter ADC | 0.890 | |||||
| Occipital white matter AD | 0.913 | |||||
| Occipital white matter RD | 0.913 | |||||
| Parietal white matter FA | 0.855 | |||||
| Parietal white matter ADC | 0.880 | |||||
| Parietal white matter AD | 0.865 | |||||
| Parietal white matter RD | 0.872 | |||||
| Temporal white matter FA | 0.785 | |||||
| Temporal white matter ADC | 0.845 | |||||
| Temporal white matter AD | 0.770 | |||||
| Temporal white matter RD | 0.836 | |||||
| PLIC/Thalamus FA | 0.940 | |||||
| PLIC/Thalamus ADC | 0.872 | |||||
| PLIC/Thalamus AD | 0.848 | |||||
| PLIC/Thalamus RD | ||||||
| Variance Explained | ||||||
| Eigenvalue | 10.43 | 6.96 | 4.27 | 2.23 | 1.91 | 1.87 |
| Percentage | 32.60 | 21.74 | 13.34 | 10.08 | 5.97 | 5.83 |
DTI, diffusion tensor imaging; FA, fractional anisotropy; ALIC, anterior limb internal capsule; ADC, apparent diffusion coefficient; AD, axial diffusivity; RD, radial diffusivity; PLIC, posterior limb internal capsule.