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Risk factors for subarachnoid hemorrhage
A I Qureshi1, M F Suri, A M Yahia
1Department of Neurosurgery, State University of New York, Buffalo, USA. aiqureshi@hotmail.com
Neurosurgery
|August 29, 2001
Summary
Cigarette smoking significantly increases subarachnoid hemorrhage (SAH) risk. This heightened risk persists even after quitting, emphasizing the critical need for early smoking cessation to prevent SAH.
Area of Science:
- Neurology
- Epidemiology
- Public Health
Background:
- Cigarette smoking is a known risk factor for subarachnoid hemorrhage (SAH).
- The impact of smoking cessation on SAH risk requires further investigation.
Purpose of the Study:
- To investigate the association between smoking status and SAH risk.
- To identify other cerebrovascular risk factors contributing to SAH.
Main Methods:
- A case-control study involving 323 SAH patients and 969 matched controls.
- Multivariate logistic regression analysis was used to assess the independent association of smoking and risk factors with SAH.
- A subgroup analysis focused on aneurysmal SAH.
Main Results:
- Both current (OR, 5.2) and previous smoking (OR, 4.5) were significantly associated with SAH.
- Hypertension also showed a significant association with SAH (OR, 2.4).
- Risk factors for aneurysmal SAH were similar to overall SAH, with current smoking (OR, 5.4) and previous smoking (OR, 4.1) showing strong associations.
Conclusions:
- Hypertension and cigarette smoking are confirmed risk factors for SAH.
- The elevated SAH risk associated with smoking persists even after cessation.
- Early smoking abstinence is crucial for mitigating SAH risk.