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Table 1: Frequency and measurements of intracranial findings^{^a}
CSF Leak (n = 76) No CSF Leak (n = 98) P Value
Smooth dural enhancement 54 (57.4%) 9 (12.5%) P < .001^{^b}
Dural enhancement in IACs 34 (36.2%) 4 (5.6%) P < .001^{^b}
Subdural fluid collections 9 (9.2%) 4 (5.3%) P = .32
Superficial siderosis 3 (3.1%) 1 (1.3%) P = .44
Pituitary engorgement 56 (57.1%) 17 (22.4%) P < .001^{^b}
Non-Chiari cerebellar tonsillar descent of >5 mm 22 (22.4%) 8 (10.5%) P = .04^{^b}
Dural venous sinus engorgement Yes = 25 (25.8%) Indeterminate = 27 (27.8%) Yes = 5 (6.6%) Indeterminate = 4 (5.3%) P < .001^{^b}
Layered hyperostosis 8 (8.2%) 3 (3.9%) P = .25
Cerebral aqueduct iter below incisural line 33 (33.7%) 15 (19.7%) P = .04^{^b}
Average mamillopontine distance (mm) 5.5 (SD, 2.1) mm 5.9 (SD, 1.7) mm P = .13
Average prepontine cistern size (mm) 4 (SD, 1.5) mm 4.2 (SD, 1.6) mm P = .35
Average suprasellar cistern size (mm) 3.2 (SD, 2.1) mm 4.8 (SD, 2.7) mm P < .001^{^b}
↵a Indeterminate dural sinus engorgement is counted as positive in this analysis.
↵b Statistically significant P values.