Summary of results from the control and 3 study groups
| Group | Control Group: Non-SIH | Study Group 1: SIH+/CSF Leak−/ Hyperdense Vein− | Study Group 2: SIH+/CSF Leak+ | Study Group 3: SIH+/ Hyperdense Vein+ |
|---|---|---|---|---|
| Included patients (No.) | 47 | 83 | 44 | 17 |
| Mean age (range) (yr) | 66 (35–91) | 59 (31–87) | 54 (28–71) | 56 (37–84) |
| Male sex | 62% | 45% | 36% | 41% |
| Mean intrathecal contrast volume injected (range) (mL) | 14 (10–20) | 15 (12–20) | 13 (6–20) | 14 (12–18) |
| Initial CTM | ||||
| All patients: mean time from contrast injection to initial CTM (range) (min) | 35 (19–101) | 40 (2–113) | 20 (2–87) | 41 (4–83) |
| Patients with renal contrast (No.) (%) | 0/47 (0%) | 10/83 (12%) | 1/44 (2%) | 7/17 (41%) |
| Patients with renal contrast: mean time from contrast injection to initial CTM (range) (min) | NA | 61 (17–96) | Contrast injection time not documented in this patient | 37 (4–62) |
| Delayed imaging | ||||
| Patients with delayed imaging (No.) (%) | 0/47 (0%) | 73/83 (88%) | 11/44 (25%) | 15/17 (88%) |
| All patients: mean time from contrast injection to delayed CTM (range) (min) | NA | 199 (79–364) | 162 (93–325) | 195 (100–386) |
| Patients with renal contrast (No.) (%) | NA | 23/73 (32%) | 3/11 (27%) | 8/15 (53%) |
| Patients with renal contrast: mean time from contrast injection to delayed imaging (range) (min) | NA | 220 (126–364) | 211 (97–325) | 184 (100–386) |
Note:—NA indicates not applicable.