Table 2.

Summary of MRI findings

	Control	iNPH	P value
Number	9	20
Evans index	0.27 ± 0.02	0.34 ± 0.03	<0.0001*
Evans index >0.3, N (%)	9 (0)	20 (100)	<0.0001*
Callosal angle (degree), mean ± SD	106 ± 10.2	66.6 ± 18.1	<0.0001*
Callosal angle <90°, N (%)	0 (0)	18 (90)	<0.0001*
High convexity tightness, N (%)	1 (11)	16 (80)	0.0021*
Enlarged Sylvian fissure, N (%)	0 (0)	16 (80)	0.0003*
Disproportionately enlarged subarachnoid-space hydrocephalus, N (%)	0 (0)	14 (70)	<0.0001*
Deep white matter hyperintensity (Fazekas rating scale)			0.0038*
Grade 0, N	5	1
Grade 1, N	2	2
Grade 2, N	0	11
Grade 3, N	2	6
Periventricular hyperintensity (Fazekas rating scale)			0.0013*
Grade 0, N	5	0
Grade 1, N	1	3
Grade 2, N	3	7
Grade 3, N	0	10
Virchow–Robin spaces in semioval center			0.0047*
Grade 1 (few), N	0	10
Grade 2 (sparse), N	1	5
Grade 3 (abundant), N	8	5
Virchow–Robin spaces in basal ganglia			0.1659
Grade 1 (few), N	2	1
Grade 2 (sparse), N	1	8
Grade 3 (abundant), N	6	11

N number of individuals.

* Statistically significant.