Table V.

Standardized loadings on the tract factors in the models of fractional anisotropy (FA) and mean diffusivity (MD) across age groups

		Model tract‐factors (Fig. 1A)				Model general (Fig. 1B)
		FA		MD		FA		MD
Factor	Indicator	60–72 years	78–87 years	60–72 years	78–87 years	60–72 years	78–87 years	60–72 years	78–87 years
CCG	Left	0.85	0.86	0.84	0.83	0.76	0.85	0.62	0.62
	Right	0.92	0.88	0.86	0.81	0.80	0.86	0.69	0.70
CHC	Left	0.67	0.57	0.65	0.69	0.33	0.32	0.32	0.42
	Right	0.72	0.68	0.81	0.80	0.36	0.40	0.44	0.50
CS	Left	0.96	0.94	0.94	0.96	0.76	0.77	0.81	0.79
	Right	0.95	0.93	0.87	0.92	0.77	0.77	0.77	0.77
FMAJ	Left	0.91	0.90	0.82	0.82	0.73	0.65	0.74	0.67
	Right	0.85	0.88	0.82	0.89	0.68	0.64	0.72	0.70
FMIN	Left	0.92	0.95	0.92	0.90	0.83	0.84	0.80	0.80
	Right	0.91	0.95	0.95	0.91	0.81	0.85	0.81	0.79
IFOF	Left	0.91	0.90	0.88	0.88	0.78	0.77	0.85	0.82
	Right	0.97	0.90	0.89	0.90	0.84	0.80	0.87	0.87
SLF	Left	0.94	0.92	0.98	0.94	0.88	0.82	0.92	0.87
	Right	0.92	0.88	0.92	0.89	0.85	0.80	0.86	0.81

Note: CCG, cingulum cingulate gyrus; CHC, cingulum hippocampus; CS, corticospinal tract; FMAJ, forceps major; FMIN, forceps minor; IFOF, inferior fronto‐occipital fasciculus; SLF, superior longitudinal fasciculus. All loadings were significant at P < 0.05. The standardized loadings, which are interpreted as correlations, may differ somewhat between age groups although the unstandardized loadings were fixed over age group.