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 | |