Nutrition
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Meta Analysis
Tea consumption and lung cancer risk: a meta-analysis of case-control and cohort studies.
Recent epidemiologic studies, especially cohort and case-control studies, have yielded inconsistent findings regarding the association between tea consumption and risk for lung cancer. The aim of this study was to assess a potential relationship between tea consumption and the incidence of lung cancer worldwide. ⋯ Tea consumption may offer some protection against lung cancer.
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Meta Analysis
Association of vitamin A and β-carotene with risk for age-related cataract: a meta-analysis.
Whether vitamin A and β-carotene as nutrients are protective factors against cataracts remains unclear. Thus, the aim of this study was to summarize the evidence from epidemiologic studies of vitamin A and β-carotene with the risk for cataract. ⋯ Greater vitamin A and β-carotene intakes might be inversely associated with risk for cataract.