TABLE 3.

Stepwise regression explaining variability in delayed episodic memory composite.

Delayed memory composite score	Independent variables	β	t-value	F	ΔF	R 2	ΔR2
Step 1				7.13**		0.07
	Sex	0.26	2.67**
Step 2				6.12**	4.83*	0.11	0.04
	Sex	0.23	2.48*
	Fornix RD	–0.21	−2.20*
Step 3				7.44***	9.11**	0.18	0.07
	Sex	0.26	2.84**
	Fornix RD	–0.38	−3.54***
	Hippocampal cingulum RD	0.33	3.02**
Step 4				6.89***	4.48*	0.22	0.04
	Sex	0.26	2.91**
	Fornix RD	–0.48	−4.16***
	Hippocampal cingulum RD	0.35	3.29***
	RS salience	–0.21	−2.12*

Variables entered into model: age, sex, Aβ₄₂/Aβ₄₀, p-tau₁₈₁, entorhinal volume, hippocampal volume, fornix RD, hippocampal cingulum RD, salience network functional connectivity. RD, radial diffusivity; RS, resting state. *p < 0.05; **p < 0.01; ***p < 0.001. Bolded values represent statistically significant findings.