Population characteristics
| Surviving group (n=84) | Deceased group (n=13) | |
| Mean age (years) | 52 | 53 |
| Sex | ||
| Male | 31 | 4 |
| Female | 53 | 9 |
| Diagnosis | ||
| CT | 67 | 13 |
| Lumbar puncture | 17 | 0 |
| Fisher | ||
| 1 | 16 | 0 |
| 2 | 17 | 4 |
| 3 | 20 | 5 |
| 4 | 23 | 4 |
| Hydrocephalus | 30 | 4 |
| Hunt and Hess | ||
| I | 40 | 2 |
| II | 32 | 2 |
| III | 10 | 5 |
| IV | 1 | 3 |
| V | 1 | 1 |
| GOS at discharge | ||
| I | 0 | 2 |
| II | 0 | 1 |
| III | 10 | 1 |
| IV | 41 | 7 |
| V | 33 | 2 |
GOS, Glasgow Outcome Score.