Table 1.
Study design: inclusions and exclusions for the three CTM groups
| Early Control (CTM for non-SIH indications, early CT images) | SIH study group (SIH, dural CSF leak negative CTM) | Delayed Control (CTM prior to spine ablation, late CT images) | |
|---|---|---|---|
| Patients from initial database search, n | 149 | 74 | 6 |
| Exclusion reason, n | Iatrogenic leak (22) Traumatic leak (14) Prior CSF leak (4) More recent CTM available (8) |
Cervical only CTM (15) CTM for shunt evaluation or cisternography (4) CSF leak present (1) Mixed subdural-intrathecal injection (1) Qualified for delayed control group (5) |
None |
|
| |||
| Total excluded patients, n | 48 | 26 | 0 |
|
| |||
| Total included patients, n | 101 | 48 | 6 |
CTM, computed tomography myelogram; SIH, spontaneous intracranial hypotension; CSF, cerebrospinal fluid.