Table 2.

Neuroimaging Markers From Total Brain and Univariate Associations With PA

	Fractional Anisotropy	Mean Diffusivity*	Parenchyma Atrophy, cm3	White Matter Hyperintensities†
Total (N = 276)	0.3581±0.0140	1.3057±0.1102	908.4±137.0	138 (50.0)
Sedentary (N = 39, 14.1%)	0.3552±0.0176	1.3326±0.1337	892.3±153.3	22 (56.4)
Lifestyle active (N = 148, 53.6%)	0.3581±0.0132	1.3062±0.1105	910.0±129.3	78 (52.7)
Exercise active (N = 89, 32.2%)	0.3594±0.0136	1.2930±0.0968	912.6±143.2	38 (42.7)
p value	.298	.174	.726	.226

Notes: Values are mean ± SD or N (%). p values were obtained from analysis of variance or χ² tests as appropriate. PA = physical activity.

*Multiplied by 1,000.

^†Dichotomized at the median.