Association of Dietary Vitamin E Intake with Risk of Lung Cancer: A Dose-Response Meta-Analysis

来源 :第15届全国临床营养学术会议 | 被引量 : 0次 | 上传用户:helppeng
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  Background and Objectives: Several epidemiological studies investigating the association between dietary vitamin E intake and the risk of lung cancer have demonstrated inconsistent results.Hence, a meta-analysis was conducted to summarise evidence of the association of dietary vitamin E intake with the risk of lung cancer.Methods and Study Design: In this meta-analysis, a systematic literature search of PubMed and Web of Science was conducted to identify relevant studies published from 1955 to April 2015.If p<0.05or I2>50%, a random effect model was used to estimate overall relative risks (RRs) and 95% confidence intervals (CIs).Otherwise, a fixed effect model was applied.Publication bias was estimated using the funnel plot and Eggers test.The dose-response relationship was assessed using the method of restricted cubic splines with 4 knots at percentiles 5, 35, 65, and 95 of the distribution.Results:The pooled RR of lung cancer for the highest versus lowest categories of dietary vitamin E intake was 0.84 (95% CI=0.76-0.93).With every 2 mg/d increase in dietary vitamin E intake, the risk of lung cancer statistically decreased by 5% (RR=0.95, 95%CI =0.91-0.99, plinearity=0.0237).Conclusions: Our analysis suggests that higher dietary vitamin E intake exerts a protective effect against lung cancer.
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