Citrus fruit intake and bladder cancer risk: a meta-analysis of observational studies |
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Authors: | Sudong Liang Gaofei Lv Weikai Chen Jianxin Jiang Jingqun Wang |
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Institution: | 1. Department of Urology, Gaoyou People's Hospital Affiliated to Soochow University
Yangzhou, JiangsuChina;2. Department of Urology, Yongzhou Central Hospital Affiliated to Nanhua University
Yongzhou, HunanChina |
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Abstract: | Epidemiological studies have investigated the association between citrus fruit and bladder cancer risk; however, the results are inconsistent. To assess these issues, we conducted a meta-analysis of currently available studies. We identified relevant articles by searching the MEDLINE and EMBASE databases. We calculated the summary relative risk (RR) with 95% confidence interval (95% CI) using a random effect model. We included eight case–control studies and six cohort studies in the meta-analysis. There was a significant inverse association between citrus fruit intake and bladder cancer risk in all pooled studies (RR: 0.85; 95% CI, 0.76–0.94) and case–control studies (RR: 0.77; 95% CI, 0.64–0.92), but not in the cohort studies (RR: 0.96; 95% CI, 0.87–1.07). Our results suggest that citrus fruit intake is related to decreased bladder cancer risk. Subsequent well-designed, large prospective studies are needed to obtain better understanding of this relationship. |
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Keywords: | Bladder cancer citrus fruits meta-analysis risk |
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