Neuroepidemiology
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Meta Analysis
Caffeine intake from coffee or tea and cognitive disorders: a meta-analysis of observational studies.
Observational epidemiological studies such as cross-sectional, case-control, and cohort studies have reported inconsistent findings regarding the association between caffeine intake from coffee or tea and the risk of cognitive disorders such as dementia, Alzheimer's disease, cognitive impairment, and cognitive decline. ⋯ This meta-analysis found that caffeine intake from coffee or tea was not associated with the risk of cognitive disorders.
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The field of quantifying the association between the intake of vitamin C and risk of glioma still has conflicts. Thus, we performed a comprehensive meta-analysis to test the hypothesis that a high intake of vitamin C may be a protective effect on glioma risk. ⋯ Our analysis indicated that vitamin C intake might decrease the risk of glioma, especially among the Americans.