Key result
Current smoking was associated with an increased risk of subarachnoid hemorrhage compared with nonsmokers (RR 2.31; 95% CI 1.31-4.09), with an even higher risk in women (RR 4.00; 95% CI 1.62-9.89).
Why the study?
What is the incidence and what are the risk factors for subarachnoid hemorrhage in China?
Population
226 patients with subarachnoid hemorrhage and 434 matched controls in Baotou, Inner Mongolia, China.
Design
Case-control
Authors
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Smoking association, stronger in women, supports targeted cessation counseling; leaves open causal effects and prevention impact in Chinese cohorts.
Case-Control (n=660)
What is the incidence and what are the risk factors for subarachnoid hemorrhage in China?
Relative Risk: 2.31 (95% CI 1.31–4.09)
The incidence of subarachnoid hemorrhage in China is 6.2 per 100,000 and is strongly associated with smoking, hypertension, and low income.
Zhang et al. (2013) conducted a case-control in Subarachnoid hemorrhage (n=660). Current smoking vs. Nonsmokers was evaluated on Subarachnoid hemorrhage (RR 2.31, 95% CI 1.31-4.09). Current smoking was associated with an increased risk of subarachnoid hemorrhage compared with nonsmokers (RR 2.31; 95% CI 1.31-4.09), with an even higher risk in women (RR 4.00; 95% CI 1.62-9.89).
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