Table 6.

Bivariate correlations between modalities in marijuana users (MJ) and healthy controls (CON)

	CON			MJ
	Volume	Shape	GMd	Volume	Shape	GMd
R accumbens
Volume
r	1	0.486	0.429	1	0.116	0.532
p	0	0.030*	0.059	0	0.628	0.017*
Shape
r	0.486	1	0.353	0.116	1	−0.011
p	0.030*	0	0.126	0.628	0	−0.33
GMd
r	0.429	0.353	1	0.532	−0.011	1
p	0.059	0.126	0	0.017*	0.964	0
R amygdala
Volume
r	1	0.169	−0.244	1	0.253	0.115
p	0	0.476	0.299	0	0.282	0.630
Shape
r	0.169	1	−0.037	0.253	1	0.445
p	0.476	0	0.876	0.282	0	0.049*
GMd
r	−0.244	−0.037	1	0.115	0.445	1
p	0.299	0.876	0	0.630	0.049*	0
L accumbens
Volume
r	1	0.358	0.688	1	−0.173	0.235
p	0	0.121	0.001**	0	0.466	0.320
Shape
r	0.358	1	0.459	−0.173	1	−0.077
p	0.121	0	0.042*	0.466	0	0.748
GMd
r	0.688	0.459	1	0.235	−0.077	1
p	0.001**	0.042*	0	0.320	0.748	0
L amygdala
Volume
r	1	0.731	0.085	1	0.134	0.021
p	0	<0.001**	0.722	0	0.573	0.929
Shape
r	0.731	1	0.06	0.134	1	−0.179
p	<0.001**	0	0.801	0.573	0	0.449
GMd
r	0.085	0.06	1	0.021	−0.179	1
p	0.722	0.801	0	0.929	0.449	0

p < 0.05 uncorrected are bolded. Please note, after correcting for multiple comparisons (p < 0.002), that only the left accumbens correlation between volume and gray matter density (GMd) and the left amygdala correlations between volume and shape were significant in controls.

*p < 0.05;

**p < 0.01.