Table VII.

Results of the stepwise forward multiple regressions considering measures of dream reports (TWC, EL, B, and VV) as dependent variables, and hippocampus and amygdala anatomical measures (bilateral volume and MD), age and gender, as predictors

Dependent variables	Variables in the equation	Beta	Partial correlation coefficients	t (24)	P‐level
TWC: multiple r = 0.56, F 2,25 = 5.80, P = 0.008	LA MD	−0.37	−0.39	−2.10	0.05
EL: multiple r = 0.70; F 4,23 = 5.44, P = 0.003	LA MD	−0.49	−0.55	−3.17	0.004
	RA Vol	−0.46	−0.52	−2.90	0.008
VV: multiple r = 0.61; F3,24 = 4.76, P = 0.009	LH MD	−0.57	−0.50	−2.83	0.009
B: multiple r = 0.76; F 5,22 = 5.93, P = 0.001	RH Vol	0.59	0.53	2.90	0.008
	LA Vol	−0.49	−0.59	−3.42	0.002
	RA MD	0.47	0.42	3.00	0.006
Deep gray matter structures	Anatomic and functional significance	MRI measure	Influence on dream recall variables
Left amygdale	Lower structural integrity	+MD	Lower EL
Left amygdale	Smaller volume	−Vol	Greater B
Left hippocampus	Smaller volume	−Vol	Greater B
Right amygdale	Smaller volume	−Vol	Lower EL
Right amygdale	Lower structural integrity	+MD	Greater B
Right hippocampus	Larger volume	+Vol	Greater B

The upper panel reports variables significantly entering the regression equation. The lower panel reports a synopsis of these effects [mean diffusivity of left amygdala (LA MD), as a predictor entering in the regression equation on TWC values, is not reported in this synoptic table, since its probability (P = 0.05) does not reach the adjusted alpha level (≤0.0258)]. Vol, volume; MD, mean diffusivity; DRF, dream recall frequency; TWC, total word count; EL, emotional load; B, bizarreness; VV, visual vividness; LH, left hippocampus; RH, right hippocampus; LA, left amygdala; RA, right amygdala.