Individual Factors
- Female gender
- Age (peak incidence 40-60)
- Previous aneurysm or SAH
- Family history
- Smoking
- OCP
- Alcohol abuse
Disease Factors
- Hypertension 1:
- Atherosclerotic disease
- Cocaine or sympathomimetic use
- Connective tissue disorders:
- Marfan's syndrome 1
- Ehlers-Danlos syndrome 1
- Vasculitides 1
- Alpha 1 anti-trypsin deficiency 1
- Polycystic kidney disease 1
- Coarctation of the aorta 1
- Fibromuscular dysplasia 1
- Neurofibromatosis 1