Patient characteristics
| Characteristic | Hydrocephalus | No Hydrocephalus |
|---|---|---|
| No. of patients (%) | 49 (36) | 89 (65) |
| Mean age (SD) | 59.8 (13) | 54.1 (14) |
| Women (%) | 31 (63) | 65 (73) |
| Admission WFNS score (%) | ||
| I | 20 (41) | 47 (53) |
| II | 7 (14) | 12 (14) |
| III | 7 (14) | 9 (10) |
| IV | 11 (22) | 12 (13) |
| V | 4 (8) | 9 (10) |
| Day (after SAH) of admission scan (%) | ||
| 0 | 33 (67) | 56 (63) |
| 1 | 10 (20) | 24 (27) |
| 2 | 4 (8) | 5 (6) |
| 3 | 2 (4) | 4 (5) |
| Amount of blood (Hijdra score) | ||
| Median cisternal sum score | 24 | 22 |
| Median ventricular sum score | 2 | 0 |
| Mean bicaudate index (SD) | 0.22 (0.3) | 0.14 (0.3) |
| Mean relative bicaudate index (SD) | 1.2 (0.1) | 0.75 (0.2) |
| Aneurysm location (%) | ||
| Anterior communicatinga | 22 (45) | 41 (46) |
| Internal carotid artery | 6 (12) | 14 (16) |
| Middle cerebral artery | 6 (12) | 17 (19) |
| Posteriorb | 15 (31) | 17 (19) |
Note:—WFNS indicates World Federation of Neurologic Surgeons; SAH, subarachnoid hemorrhage.
a Includes the anterior cerebral artery.
b Basilar or vertebral arteries.