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. Author manuscript; available in PMC: 2009 Nov 17.
Published in final edited form as: J Neuroimaging. 2008 Jul;18(3):268–275. doi: 10.1111/j.1552-6569.2007.00191.x

Table 2.

Mean MRI Trait Values among Affected and Unaffected Siblings

Affected
Sibs (n = 214)		 Unaffected
Sibs (n = 234)
CA (Std. dev.)1 62.0 (13.8) 45.7 (14.1)
logWMH (Std. dev.)2 2.3 (1.2) 1.2 (2.0)
MTA (Std dev)2,3 2.7 (1.2) .78 (1.0)
MRI infarcts
     Present (no.)4 49 37
     Small (%) 17 14
     Large (%) 5 2
1

Pooled t-test P < .0001;

2

Unequal variances t-test P < .0001.

3

Treated as continuous variable;

4

χ2 test P = .038.