. 2015 May 15;7(1):27. doi: 10.1186/s13195-015-0111-8

Table 2.

White matter hyperintensity characteristics ^a

	Mean, mm ³	SD	SE	95% confidence interval		Group comparison P -value
	Mean, mm ³	SD	SE	Lower	Upper	Group comparison P -value
Patients with white matter hyperintensity (WMH) volume ≤10 cm³ (n = 183)
APOE ε4 carriers (n = 120)	1,857	2,026	185	1,491	2,223	0.01
APOE ε4 non-carriers (n = 63)	2,873	2,780	350	2,173	3,573	0.01
Patient group overall (including subjects with severe WMH volume, n = 201)
APOE ε4 carriers (n = 128)	2,659	3,810	337	1,993	3,325	0.01
APOE ε4 non-carriers (n = 73)	4,940	6,616	774	3,396	6,483	0.01

^a APOE, Apolipoprotein E; SD, Standard deviation; SE, Standard error.