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Table 1: 
Quantification of perivascular spaces by site in patients with IIH versus controls
LocationIIH Mean No. of Dilated PVS (SD)Control Mean No. of Dilated PVS (SD)P Valuek Value (mean) (range)
Centrum semiovale2.3 (1.4)1.3 (1.1).0030.58 (0.51–0.67)
Basal ganglia1.7 (0.6)1.2 (0.7).0090.85 (0.81–0.89)
Midbrain0.5 (0.5)0.4 (0.5).470.47 (0.40–0.54)
Total4.5 (1.9)2.9 (1.9).0040.71 (0.65–0.76)