Table 2.

The regression models for the neuropsychological assessments.

	MMSE			Immediate recall			Delayed free recall			Recognition*			TMT B-A
	β	95%CI	P	β	95%CI	P	β	95%CI	P	β	95%CI	P	β	95%CI	P
z score of mean FA	0.452	0.349−1.792	0.004	0.464	1.109−5.310	0.003	0.600	1.076−2.973	0.000	0.386	0.385–1.970	0.004	−1.877	−0.265−0.008	0.065
z score of total GM ratio	−0.246	−1.398−0.232	0.158	−0.015	−2.473−2.271	0.933	−0.051	−1.243−0.900	0.751	-	-	-	−0.204	−0.235−0.068	0.274
z score of hippocampal ratio	1.076	0.182−4.917	0.035	0.159	−5.794−7.989	0.752	−0.233	−3.900−2.325	0.615	-	-	-	0.232	−0.368−0.561	0.679
z score of NbM ratio	−0.664	−3.902−0.758	0.183	0.130	−5.883−7.681	0.792	0.417	−1.658−4.469	0.363	-	-	-	−0.175	−0.527−0.383	0.752

^*Recognition was not correlated with brain volumes, thus brain volumes were not added in the regression model.