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Does smoking increase the risk of developing glioma? A meta-analysis based on case-control studies
1Department of Neurology, Henan University Huaihe Hospital, Kaifeng, Henan, P.R. China.
Objective:
The purpose of this study was to assess the relationship between smoking and glioma risk by meta-analysis.
Materials And Methods:
We have searched the databases of MEDLINE, EMBASE, Ovid, and CNKI to find the suitable studies related to association between smoking and glioma risk. The pooled odds ratio (OR) and 95% confidence interval (CI) of smokers in glioma patients compared to normal controls were aggregated by statistic software Stata11.0. The publication bias was evaluated by Begg's funnel plot.
Results:
Finally, seven case-control studies were included in this meta-analysis. The pooled results showed that smoking did not increase the risk of glioma (OR = 0.96, 95% CI = 0.86-1.07, P > 0.05).
Conclusion:
No close association between smoking and glioma risk was found in this meta-analysis, which indicate that smoking may not contribute to the incidence of glioma.
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