Table 5.

Influence of confound variables on the relationship between detailed delay episodic memory performance and intervoxel similarity in posterior hippocampus^a

Sex				tSNR
	β	SE	t		β	SE	t
Postencoding rest				Postencoding rest
Intervoxel similarity	−1.849	0.786	−2.351*	Intervoxel similarity	−1.816	0.775	−2.345*
Age	−0.025	0.014	−1.843	Age	−0.027	0.013	−1.991
Sex	0.015	0.037	0.417	tSNR	0.001	0.001	1.038
No. of voxels				Motion (FWD)
Postencoding rest				Postencoding rest
Intervoxel similarity	−1.724	0.807	−2.137*	Intervoxel similarity	−1.712	0.759	−2.256*
Age	−0.026	0.014	−1.911	Age	−0.027	0.013	−2.082*
No. of voxels	0.003	0.005	0.630	FWD	−0.355	0.220	−1.611
Sleepiness				Univariate encoding activity
Postencoding rest				Postencoding rest
Intervoxel similarity	−1.947	0.834	−2.335*	Intervoxel similarity	−1.765	0.787	−2.242*
Age	−0.020	0.014	−1.380	Age	−0.024	0.013	−1.814
Sleepiness	0.024	0.100	0.241	Univariate	0.074	0.096	0.771
Spontaneous recall				Train-test intervalb
Postencoding rest				Postencoding rest
Intervoxel similarity	−1.343	0.695	−1.933	Intervoxel similarity	−1.804	0.860	−2.098*
Age	−0.009	0.013	−0.665	Age	−0.022	0.013	−1.695
Recall	0.164	0.079	2.080	Train-test interval	0.012	0.006	1.804

^aβ values represent unstandardized regression coefficients. No. of voxels represents the number of voxels in the region of interest. tSNR represents the temporal signal to noise ratio. FWD represents the framewise displacement in motion.

^bOne outlier participant was excluded from this model with train-test interval > 1 month.

*p < 0.05.