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Dietary patterns and risk of bladder cancer: a systematic review and meta-analysis.
BMC Public Health. 2022 01 11; 22(1):73.BP

Abstract

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; I2 = 49.9%, n = 2) and cohort studies (RR 0.93, 95% CI: 0.88, 0.97; I2 = 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; I2 = 0%, n = 2) showed a direct association between WD and BC, case-control studies (OR 1.33, 95% CI 0.81, 1.88; I2 = 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; I2 = 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; I2 = 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.

TRIAL REGISTRATION

Protocol registration number: CRD42020155353. Database for protocol registration: The international prospective register of systematic reviews database (PROSPERO). Data of registration: August 2020.

Links

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Authors+Show Affiliations

Dianatinasab M
Department of Epidemiology, Faculty of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran. m.dianatinasab@maastrichtuniversity.nl. Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands. m.dianatinasab@maastrichtuniversity.nl.
Forozani E
School of Physical and Occupational Therapy, McGill University, Montreal, Canada. forozani.elahe@gmail.com.
Akbari A
Graduate student and Research assistant, The college of health sciences, The University of Memphis, Memphis, USA.
Azmi N
Department of Epidemiology, Iran University of Medical Sciences, Tehran, Iran.
Bastam D
Medical School, Yasuj University of Medical Sciences, Yasuj, Iran.
Fararouei M
Department of Epidemiology, Faculty of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran.
Wesselius A
Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands.
Zeegres MP
Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands.

MeSH

Case-Control StudiesDietDiet, MediterraneanHumansIncidenceRare DiseasesRisk FactorsUrinary Bladder Neoplasms

Pub Type(s)

Journal Article
Meta-Analysis
Systematic Review

Language

eng

PubMed ID

35016647

Citation

Dianatinasab, Mostafa, et al. "Dietary Patterns and Risk of Bladder Cancer: a Systematic Review and Meta-analysis." BMC Public Health, vol. 22, no. 1, 2022, p. 73.
Dianatinasab M, Forozani E, Akbari A, et al. Dietary patterns and risk of bladder cancer: a systematic review and meta-analysis. BMC Public Health. 2022;22(1):73.
Dianatinasab, M., Forozani, E., Akbari, A., Azmi, N., Bastam, D., Fararouei, M., Wesselius, A., & Zeegres, M. P. (2022). Dietary patterns and risk of bladder cancer: a systematic review and meta-analysis. BMC Public Health, 22(1), 73. https://doi.org/10.1186/s12889-022-12516-2
Dianatinasab M, et al. Dietary Patterns and Risk of Bladder Cancer: a Systematic Review and Meta-analysis. BMC Public Health. 2022 01 11;22(1):73. PubMed PMID: 35016647.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary patterns and risk of bladder cancer: a systematic review and meta-analysis. AU - Dianatinasab,Mostafa, AU - Forozani,Elaheh, AU - Akbari,Ali, AU - Azmi,Nazanin, AU - Bastam,Dariush, AU - Fararouei,Mohammad, AU - Wesselius,Anke, AU - Zeegres,Maurice P, Y1 - 2022/01/11/ PY - 2021/08/17/received PY - 2022/01/05/accepted PY - 2022/1/12/entrez PY - 2022/1/13/pubmed PY - 2022/4/12/medline KW - Bladder Cancer KW - Dietary Inflammatory Index KW - Mediterranean Diet KW - Meta-analysis KW - Western Diet SP - 73 EP - 73 JF - BMC public health JO - BMC Public Health VL - 22 IS - 1 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; I2 = 49.9%, n = 2) and cohort studies (RR 0.93, 95% CI: 0.88, 0.97; I2 = 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; I2 = 0%, n = 2) showed a direct association between WD and BC, case-control studies (OR 1.33, 95% CI 0.81, 1.88; I2 = 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; I2 = 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; I2 = 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. TRIAL REGISTRATION: Protocol registration number: CRD42020155353. Database for protocol registration: The international prospective register of systematic reviews database (PROSPERO). Data of registration: August 2020. SN - 1471-2458 UR - https://www.unboundmedicine.com/medline/citation/35016647/Dietary_patterns_and_risk_of_bladder_cancer:_a_systematic_review_and_meta_analysis_ DB - PRIME DP - Unbound Medicine ER -