Cox regression analysis of 368 patients with hyponatraemia after SAH
| Covariable | aHR (95% CI) | P value |
| Age (years) | 1.0 (1.0 to 1.0) | 0.055 |
| Male | 1.2 (0.8 to 1.6) | 0.35 |
| WFNS grade IV–V | 0.5 (0.4 to 0.8) | 0.004 |
| Fisher grade 2–4 | 1.7 (1.1 to 2.7) | 0.022 |
| Medications associated with hyponatraemia | ||
| None | Reference | |
| One | 1.0 (0.7 to 1.5) | 0.91 |
| Multiple | 0.75 (0.5 to 1.2) | 0.21 |
| Aneurysm location | ||
| Non-aneurysmal SAH | Reference | |
| Anterior circulation | 1.3 (0.8 to 2.1) | 0.26 |
| Posterior circulation | 2.1 (1.2 to 3.7) | 0.012 |
AhR, adjusted hyponatraemia-specific; SAH, subarachnoid haemorrhage; WFNS, World Federation of Neurosurgical Societies.