Joint association of drinking alcohol and obesity in relation to cancer risk: A systematic review and data synthesis

Rates of alcohol consumption and obesity are increasing in many Western populations. For some cancer types, both heavy alcohol consumption and obesity are independently associated with increased risk. Whether combined exposure to both synergistically increases an individual's risk of cancer is...

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Veröffentlicht in:Cancer epidemiology 2024-08, Vol.91, p.102596, Article 102596
Hauptverfasser: Macdonald, Graeme A., Thomas, James A., Dalais, Christine, Kendall, Bradley J., Thrift, Aaron P.
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container_start_page 102596
container_title Cancer epidemiology
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creator Macdonald, Graeme A.
Thomas, James A.
Dalais, Christine
Kendall, Bradley J.
Thrift, Aaron P.
description Rates of alcohol consumption and obesity are increasing in many Western populations. For some cancer types, both heavy alcohol consumption and obesity are independently associated with increased risk. Whether combined exposure to both synergistically increases an individual's risk of cancer is unclear. We performed a systematic review to assess whether alcohol and obesity interact to confer higher risk for cancer than the additive sum of their effects. A systematic literature search was conducted from the inception date to 13 February 2024 of PubMed, Embase, Cochrane Library and Web of Science to identify studies of alcohol, obesity, and cancer risk. We aimed to undertake a meta-analysis if there were sufficient data. The literature search identified 17,740 potentially eligible studies. After review, 24 studies were included. Eleven reported on the association between alcohol consumption and cancer risk in individuals according to their body mass index (BMI), nine reported on the association between BMI and cancer risk in individuals according to their alcohol consumption, and six studies examined potential synergistic interactions between alcohol consumption and obesity on cancer risk. However, there were insufficient data and significant heterogeneity in the cancers studied to undertake meta-analysis, therefore a systemic review and narrative synthesis was conducted. Overall, there was no consistent pattern of interaction between alcohol use and overweight/obesity on cancer risk across cancer types. While alcohol and obesity are prevalent and important risk factors for a range of cancers, data are lacking on whether their combined exposure may synergistically increase an individual's risk for cancer. Further study across more cancer types is required to better understand the nature of interactions between alcohol use and obesity on cancer risk. •Alcohol use and obesity are recognized independent cancer risk factors.•Few studies have examined interactions between drinking alcohol and obesity.•There was no consistent pattern of interaction on cancer risk across cancer types.•There was heterogeneity of studies in modeling alcohol use and obesity.•Further research is needed to clarify potential additive associations with cancer.
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subjects Adiposity
Alcohol
Alcohol use
Alcoholic beverages
Alcohols
Body mass index
Body size
Breast cancer
Cancer
Cancer risk
Carcinogens
Cohort analysis
Data analysis
Drinking behavior
Health risks
Heterogeneity
Interaction
Literature reviews
Meta-analysis
Obesity
Observational studies
Overweight
Oxidative stress
Pancreatic cancer
Pattern analysis
Public health
Reviews
Risk analysis
Risk factors
Synthesis
Systematic review
Womens health
title Joint association of drinking alcohol and obesity in relation to cancer risk: A systematic review and data synthesis
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