Association of CSF leak rates by pre-myelographic screening exam
| Leak Rate |
||||
|---|---|---|---|---|
| Fast (n = 32) | Slow (n = 36) | None (n = 83) | Slow or None (n = 119)a | |
| Spine MRI (n = 104) | ||||
| Fluid | 85% (23/27) | 55% (11/20) | 9% (5/57) | 21% (16/77) |
| No fluid | 15% (4/27) | 45% (9/20) | 91% (52/57) | 79% (61/77) |
| Brain MRI (n = 136) | ||||
| Classic | 61% (19/31) | 44% (12/27) | 47% (37/78) | 47% (49/105) |
| Partial | 13% (4/31) | 22% (6/27) | 26% (20/78) | 25% (26/105) |
| Normal | 26% (8/31) | 33% (9/27) | 27% (21/78) | 29% (30/105) |
| Brain and spine MRI (n = 98) | ||||
| Classic + fluid | 46% (12/26) | 25% (4/16) | 7% (4/56) | 11% (8/72) |
| Other | 54% (14/26) | 75% (12/16) | 93% (52/56) | 89% (64/72) |
| Opening pressure (n = 76) | ||||
| Mean mm H20 (SD) | 94.8 (61.3) (n = 11) | 113.1 (74.3) (n = 20) | 108.6 (52.4) (n = 45) | 109.9 (59.4) (n = 65) |
a
The data in the columns labeled “Slow” and “None” were summed in a fourth column, “Slow or None,” to allow binary analysis of leak rate as either fast (requiring dynamic CTM) or slow or none (not requiring dynamic CTM).