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Published on: March 29, 2019
Alcohol drinking and bladder cancer risk: a meta-analysis
C Pelucchi1, C Galeone, I Tramacere
1Department of Epidemiology, Mario Negri Institute for Pharmacological Research, Milan, Italy. claudio.pelucchi@marionegri.it
Summary
This meta-analysis found no significant link between alcohol consumption and bladder cancer risk. Even heavy drinking showed no material association with developing this cancer.
Area of Science:
- Epidemiology
- Oncology
- Public Health
Background:
- Investigating the association between alcohol consumption and bladder cancer risk is crucial for public health.
- Previous studies have yielded inconsistent results regarding this relationship.
Purpose of the Study:
- To conduct a meta-analysis of epidemiological studies to investigate the risk of bladder cancer at different levels of alcohol consumption.
- To provide definitive evidence on the association between alcohol drinking and bladder cancer risk.
Main Methods:
- Systematic literature search in the Medline database (PubMed) up to October 2010.
- Inclusion of 16 case-control and 3 cohort studies, totaling 11,219 bladder cancer cases.
- Pooled relative risks (RR) and 95% confidence intervals (CI) calculated using random effects models, defining moderate intake as <3 drinks/day and heavy intake as ≥3 drinks/day.
Main Results:
- Compared to non-drinkers, pooled RRs for moderate and heavy alcohol drinkers were 1.00 (95% CI 0.92-1.09) and 1.02 (95% CI 0.78-1.33), respectively.
- Excluding studies that did not adjust for tobacco smoking yielded similar estimates: 0.98 (95% CI 0.89-1.07) for moderate and 0.97 (95% CI 0.72-1.31) for heavy drinkers.
- No statistically significant increase in bladder cancer risk was observed across different levels of alcohol consumption.
Conclusions:
- This meta-analysis provides strong evidence for the absence of a material association between alcohol consumption and bladder cancer risk.
- The findings indicate that even high levels of alcohol intake do not significantly increase the risk of developing bladder cancer.
- These results have implications for public health guidelines and cancer prevention strategies related to alcohol consumption.
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