Patient characteristics
| Patients | % | |
|---|---|---|
| Total No of patients | 9845 | 100 |
| Female | 5427 | 55.1 |
| Male | 2390 | 24.3 |
| Sex not reported | 2028 | 20.6 |
| M/F ratio | 0.44 | |
| Age range (years) | 1–86 | |
| Patients with multiple aneurysms | 1263 | 12.8 |
| Presentation | ||
| Symptomatic | 1028 | 10.4 |
| Asymptomatic | 2342 | 23.8 |
| Cranial nerve palsy | 312 | 3.2 |
| Previous episode of SAH from another lesion | 628 | 6.4 |
| Not reported | 5535 | 56.2 |
| Treatment | ||
| Clipping | 3122 | 31.7 |
| Clipping+bypass | 28 | 0.3 |
| Wrapping | 118 | 1.2 |
| Wrapping+bypass | 3 | 0.0 |
| Clipping+wrapping | 13 | 0.1 |
| Proximal occlusion+bypass | 53 | 0.5 |
| Trapping | 54 | 0.5 |
| Bipolar coagulation and gauze reinforcement | 39 | 0.4 |
| Proximal occlusion | 120 | 1.2 |
| Not reported | 6295 | 63.9 |
SAH, subarachnoid haemorrhage.