Imaging Finding | IIH | PT |
---|---|---|
Stenosis type | ||
Extrinsic stenosis | 58 | 8 |
Mixed extrinsic and intrinsic | 17 | 0 |
Intrinsic stenosis | 40 | 37 |
Total | 115 | 45 |
χ² P value ≤ .001b | ||
Saccular venous aneurysm | ||
Yes | 4 | 11 |
No | 111 | 34 |
Total | 115 | 45 |
χ² P value ≤.001 | ||
Sella appearance | ||
Partially empty | 49 | 18 |
Empty | 61 | 15 |
Normal | 5 | 11 |
NA (adenoma) | 0 | 1 |
Total | 115 | 45 |
χ² P value ≤ .001 | ||
Optic nerve tortuosity | ||
Minimal | 46 | 31 |
Marked | 69 | 14 |
Total | 115 | 45 |
χ² P value = .001 |
Note:—NA indicates not applicable; IIH, idiopathic intracranial hypertension; PT, pulsatile tinnitus.
↵a χ2 cross-tabulation P values were calculated for each variable. Eighty-two percent of pulsatile tinnitus sinuses had intrinsic stenosis, and 65% of idiopathic intracranial hypertension sinuses had extrinsic stenosis (P value < .001). Statistically significant differences were noted when comparing the distribution of optic nerve tortuosity, sella appearance, and saccular aneurysm presence between the 2 groups (P values ≤ .001).
↵b Extrinsic and mixed subgroups summed for χ2 calculation.