Table 1:

Age and WMH volume by automated measurement for given WMH grade, n = 559

Grade	Number	Percent	Age			WMH (ml)
Grade	Number	Percent	Mean	SD	Range	Median	Q1-Q3	Range
0	241	43.1%	46.7	8.8	25–72	0.65	0.43–0.91	0.14–2.20
1	255	45.6%	51.4	8.9	27–71	1.01	0.71–1.42	0.13–5.51
2	49	8.8%	58.6	7.9	37–72	2.16	1.42–3.38	0.55–9.69
3	14	2.5%	64.2	5	57–72	13.97	7.15–30.18	4.53–83.18