Table 3.

Standardized beta coefficients for Aβ₄₂ and pTau₁₈₁ models, including task-driven fMRI functional connectivity measures [cross-correlation (CC) and total interdependence (TI)].

	Dependent variable
	Aβ42 (pg/ml)		pTau181 (pg/ml)
Model Adj. R2	0.317	0.646	0.359	0.149
Connectivity measures	CC	TI	CC	TI
Predictor
Age, 1 year		−0.668b
Sex
Education, 1 year
PCC–mPFC		0.430b
PCC–lAG
PCC–rAG		−0.526b
PCC–lMTG
PCC–rMTG	−0.395a
mPFC–lAG
mPFC–rAG
mPFC–lMTG	−0.418a	−0.901c	−0.401a
mPFC–rMTG
lAG–rAG			0.591b	0.428a
lAG–lMTG
lAG–rMTG
rAG–lMTG		1.158c
rAG–rMTG
lMTG–rMTG	0.623b

The predictors are significant at the following: ^ap < 0.05 level.; ^bp < 0.01 level.; ^cp < 0.0001 level.

Standardized coefficients estimate the number of SDs the dependent variable will change given a one-SD increase in the predictor variable. All predictors included in the initial models are listed in the tables; predictors with no beta coefficients were excluded from the final models.