TY - JOUR
T1 - Dietary patterns and risk of bladder cancer: a systematic review and meta-analysis
AU - Dianatinasab, M.
AU - Forozani, E.
AU - Akbari, A.
AU - Azmi, N.
AU - Bastam, D.
AU - Fararouei, M.
AU - Wesselius, A.
AU - Zeegres, M.P.
N1 - Funding Information:
The first author would acknowledge M. Saadatmnad and E. Ghasemi for their cooperation in searching databases. Though, they did not meet the authorship criteria to be listed as co-authors.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/1/11
Y1 - 2022/1/11
N2 - Background Several studies have investigated the relationship between dietary patterns and the risk of bladder cancer (BC) in different regions including Europe, the United States, and Asia, with no conclusive evidence. A meta-analysis was undertaken to integrate the most recent information on the relationship between a data-driven Western diet (WD), the Mediterranean diet (MD), and dietary-inflammatory-index (DII) and the risk of BC. Method We looked for published research into the relationship between dietary patterns and the incidence of BC in the PubMed/Medline, Cochrane Library, Web of Science, and Scopus databases up until February 2021. Using a multivariate random-effects model, we compared the highest and lowest categories of WD, MD and DII patterns and provided the relative risk (RR) or odds ratios (OR) and 95 percent confidence intervals (CIs) for the relevant relationships. Results The analysis comprised 12 papers that were found to be suitable after scanning the databases. Both case-control (OR 0.73, 95% CI: 0.52, 0.94; I-2 = 49.9%, n = 2) and cohort studies (RR 0.93, 95% CI: 0.88, 0.97; I-2 = 63%, n = 4) found a substantial inverse association between MD and BC. In addition, although cohort studies (RR 1.53, 95% CI 1.37, 1.70; I-2 = 0%, n = 2) showed a direct association between WD and BC, case-control studies (OR 1.33, 95% CI 0.81, 1.88; I-2 = 68.5%, n = 2) did not. In cohort studies, we found no significant association between DII and BC (RR 1.02, 95% CI 0.93, 1.12; I-2 = 38.5%, n = 2). In case-control studies, however, a strong direct association between DII and BC was discovered (RR 2.04, 95% CI 1.23, 2.85; I-2 = 0%, n = 2). Conclusion The current meta-analysis showed that MD and WD have protective and detrimental effects on BC risk, respectively. No significant association between DII and the risk of BC was observed. More research is still needed to confirm the findings. Additional study is warranted to better understand the etiological mechanisms underlying how different dietary patterns affect BC.
AB - Background Several studies have investigated the relationship between dietary patterns and the risk of bladder cancer (BC) in different regions including Europe, the United States, and Asia, with no conclusive evidence. A meta-analysis was undertaken to integrate the most recent information on the relationship between a data-driven Western diet (WD), the Mediterranean diet (MD), and dietary-inflammatory-index (DII) and the risk of BC. Method We looked for published research into the relationship between dietary patterns and the incidence of BC in the PubMed/Medline, Cochrane Library, Web of Science, and Scopus databases up until February 2021. Using a multivariate random-effects model, we compared the highest and lowest categories of WD, MD and DII patterns and provided the relative risk (RR) or odds ratios (OR) and 95 percent confidence intervals (CIs) for the relevant relationships. Results The analysis comprised 12 papers that were found to be suitable after scanning the databases. Both case-control (OR 0.73, 95% CI: 0.52, 0.94; I-2 = 49.9%, n = 2) and cohort studies (RR 0.93, 95% CI: 0.88, 0.97; I-2 = 63%, n = 4) found a substantial inverse association between MD and BC. In addition, although cohort studies (RR 1.53, 95% CI 1.37, 1.70; I-2 = 0%, n = 2) showed a direct association between WD and BC, case-control studies (OR 1.33, 95% CI 0.81, 1.88; I-2 = 68.5%, n = 2) did not. In cohort studies, we found no significant association between DII and BC (RR 1.02, 95% CI 0.93, 1.12; I-2 = 38.5%, n = 2). In case-control studies, however, a strong direct association between DII and BC was discovered (RR 2.04, 95% CI 1.23, 2.85; I-2 = 0%, n = 2). Conclusion The current meta-analysis showed that MD and WD have protective and detrimental effects on BC risk, respectively. No significant association between DII and the risk of BC was observed. More research is still needed to confirm the findings. Additional study is warranted to better understand the etiological mechanisms underlying how different dietary patterns affect BC.
KW - Western Diet
KW - Mediterranean Diet
KW - Dietary Inflammatory Index
KW - Bladder Cancer
KW - Meta-analysis
KW - WESTERN DIET
KW - RED MEAT
KW - BREAST
KW - CONSUMPTION
KW - BURDEN
U2 - 10.1186/s12889-022-12516-2
DO - 10.1186/s12889-022-12516-2
M3 - (Systematic) Review article
C2 - 35016647
SN - 1471-2458
VL - 22
JO - BMC Public Health
JF - BMC Public Health
IS - 1
M1 - 73
ER -