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Allergy and risk of glioma: a meta-analysis
1Department of Neurosurgery, Changzheng Hospital, Second Military Medical University, Shanghai, China.
Abstract:
We evaluated the association between allergic conditions and the risk of glioma in case-control and cohort studies published so far on this issue. A total of 12 studies (10 case-control and 2 cohort studies) were included in the analysis, involving 61 090 participants, of whom 6408 had glioma. When compared with non-allergic conditions, the pooled odds ratio (OR) with any allergic conditions for glioma was 0.60 (95% CI: 0.52-0.69, P<0.001), suggesting a significant negative association (protective effect) between allergy and glioma. Subgroup analysis showed that the ORs were 0.70 (95% CI: 0.62-0.79, P<0.001), 0.69 (95% CI: 0.62-0.78, P<0.001), and 0.78 (95% CI: 0.70-0.87, P<0.001) for asthma, eczema, and hay fever, respectively. The significant association remained even after excluding the bias of proxy reporting (OR=0.61; 95% CI: 0.50-0.75, P<0.001). We conclude that allergic conditions may significantly reduce the risk of glioma.
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