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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)
    Fluid85% (23/27)55% (11/20)9% (5/57)21% (16/77)
    No fluid15% (4/27)45% (9/20)91% (52/57)79% (61/77)
Brain MRI (n = 136)
    Classic61% (19/31)44% (12/27)47% (37/78)47% (49/105)
    Partial13% (4/31)22% (6/27)26% (20/78)25% (26/105)
    Normal26% (8/31)33% (9/27)27% (21/78)29% (30/105)
Brain and spine MRI (n = 98)
    Classic + fluid46% (12/26)25% (4/16)7% (4/56)11% (8/72)
    Other54% (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).