Proposed scale characteristics
| Component | Score point |
|---|---|
| WFNS grade | |
| IV | 3 |
| V | 5 |
| Age, year | |
| ≤50 | 0 |
| 50–65 | 1 |
| >65 | 2 |
| Fisher grade | |
| I, II | 0 |
| III | 1 |
| IV | 2 |
| Leucocytosis | |
| WCC <15×109/L | 0 |
| WCC ≥15×109/L | 2 |
| Total score | 3–11 |
WCC, white cell count; WFNS, World Federation of Neurological Surgeons Grading System for Subarachnoid Hemorrhage.