Table 2.

Comparison of GMD/WMD.

	GMD		t	P	WMD		t	P
	Mean	SD			Mean	SD
SLE (N = 95)	0.5450	0.0253	−8.132	0.000**	0.5183	0.0252	−6.455	0.000**
CTL (N = 89)	0.5767	0.0276			0.5405	0.0213
Treated (N = 55)	0.5496	0.0221	1.286	0.202	0.5262	0.0224	3.868	0.000**
Untreated (N = 40)	0.5388	0.0282			0.5074	0.0248
Active ( N = 49)	0.5399	0.0266	−2.069	0.041*	0.5169	0.0280	−0.555	0.580
Inactive (N = 46)	0.5505	0.0328			0.5198	0.0220
First diagnosis (N = 47)	0.5413	0.0267	−1.425	0.158	0.5154	0.0274	−0.233	0.273
Long duration (N = 48)	0.5487	0.0236			0.5211	0.0226

GMD: mean whole brain grey matter density; WMD: mean whole brain white matter density; ^* P < 0.05, ^** P < 0.01.