Abstract
Background
Inconsistent associations between milk and other dairy product consumption and bladder cancer (BC) have been reported. We aimed to investigate possible associations with BC risk for total and individual dairy products by bringing together the world’s data on this topic.
Methods
Thirteen cohort studies, included in the BLadder cancer Epidemiology and Nutritional Determinants (BLEND) study, provided data for 3590 BC cases and 593,637 non-cases. Associations between milk and other dairy product consumption and BC risk were investigated using Cox proportional hazard regression analyses stratified by study center and adjusted for potential confounders.
Results
Overall, total ‘other’ dairy product consumption was not associated with BC risk (HR comparing highest with lowest tertile: 0.97 (95% CI: 0.87–1.07; ptrend = 0.52) and likewise no association was observed for either liquid milk, processed milk, cream, cheese or icecream. However, an inverse association was observed between yoghurt consumption and BC risk when comparing those in the moderate (25–85 g/day) and high categories (>85 g/day) with non-consumers, with multivariate HR of 0.85 (95% CI: 0.75–0.96) and 0.88 (95% CI: 0.78–0.98), respectively.
Conclusions
We found no evidence of association between either total or individual dairy products and BC risk, but suggestive evidence that consumption of yoghurt may be associated with a decreased risk.
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Acknowledgements
We gratefully acknowledge all principal investigators for their willingness to participate in this jointed project. EYY thanks to the financial support from China Scholarship Council (No. 201706310135).
Funding
This work was partly funded by the Word Cancer Research Fund International (WCRF 2012/590) and European Commission.
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Study conception and design: AW and MPZ; analyses and interpretation of data: MA; drafting of the manuscript: MA; revised the manuscript: AW, FVO, EYY and MPZ; provided the data: PAB, EW, HOA, EW, MB, GGG and RLM; approved the manuscript: all the authors.
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Acham, M., Wesselius, A., van Osch, F.H.M. et al. Intake of milk and other dairy products and the risk of bladder cancer: a pooled analysis of 13 cohort studies. Eur J Clin Nutr 74, 28–35 (2020). https://doi.org/10.1038/s41430-019-0453-6
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DOI: https://doi.org/10.1038/s41430-019-0453-6
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