Table 3. White matter microstructure measures in non-hypertensive and hypertensive groups after propensity score matching.

	Non-hypertensive	Hypertensive	p value
N	1559	1559
White matter microstructure measure
FA	0.041±0.613	–0.043±0.653	0.001
MD	–0.070±0.616	0.063±0.680	<0.001
MO	0.000±0.341	–0.006±0.353	1.000
ICVF	0.036±0.788	–0.042±0.836	0.046
OD	0.013±0.483	–0.014±0.497	0.706
ISOVF	–0.071±0.510	0.059±0.580	<0.001
Brain volume measure
Total brain volume (ml)	1506.4±71.0	1506.7±70.9	1.000
Grey matter volume (ml)	796.8±45.8	795.8±44.4	1.000
White matter volume (ml)	709.6±40.7	710.8±41.5	1.000

Variables were expressed as means ± standard deviations and were analyzed using the Student’s t-test. White matter microstructural measures are expressed as mean z-scores referenced to the total study population (n = 4659). Significance levels were set at p<0.05 after Bonferroni correction. Abbreviations: FA, Fractional anisotropy; ICVF, Intracellular volume fraction; ISOVF, Isotropic volume fraction; MD, Mean diffusivity; MO, Diffusion tensor mode; OD, Orientation dispersion.