Table 2.

Relative degrees of severity of vascular pathology in different disorders. Abbreviations: Asymp. sig = level of significance; d.f. = degrees of freedom; CADASIL = cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy; SVD = small vessel disease; PADMAL = pontine autosomal dominant microangiopathy and leukoencephalopathy; Swedish hMID = hereditary multi‐infarct dementia of Swedish type; HERNS = hereditary endotheliopathy with retinopathy, nephropathy, and stroke

Mean rank/Kruskal–Wallis	Frontal summary score/6	Overall group rank	Basal ganglia summary score/4	Overall group rank	Total score/10	Overall group rank
Young control	9.50	7	13.32	7	7.31	7
Old control	18.50	6	22.10	6	17.44	6
SVD	23.00	2	22.63	5	21.07	4
CADASIL	30.88	1	38.00	1	33.88	1
PADMAL	23.00	2	32.90	2	28.00	2
Swedish hMID	22.75	5	24.50	3	20.75	5
HERNS	23.00	2	23.00	4	21.50	3
Total (n cases)	41		50		41
Chi‐square	19.181		19.131		23.052
d.f.	6		6		6
Asymp. sig.	0.004		0.004		0.001

Numbers computed for the Kruskal–Wallis H test for mean rank scores for vascular pathology. The cases were different, overall ranks for each group were listed in order of severity from highest rank score = 1 to lowest score = 7. Scoring based on modified methods was described by Deramecourt et al [18].