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Nutrition in acute and chronic diseases

Joint associations of adiposity and alcohol consumption with liver disease-related morbidity and mortality risk: findings from the UK Biobank

Abstract

Background

The incidence of both non-alcoholic fatty liver disease (NAFLD) and alcoholic fatty liver disease (ALD) are expected to grow as a consequence of the ongoing obesity and alcohol consumption trends.

Objective

We examined the joint associations of adiposity (body mass index (BMI) and waist circumference (WC)) and alcohol consumption on ALD, NAFLD and liver disease incidence and mortality (n = 465,437).

Methods

Alcohol consumption was categorised based on current UK guidelines (14 units/week). Data were analysed using Cox proportional hazard models. A total of 1090 liver disease deaths, 230 ALD deaths and 192 NAFLD deaths occurred over an average follow-up length of 10.5 ± 1.7 years.

Results

In multivariate models, we observed greater point estimates for risk of ALD, NAFLD and liver disease incidence and mortality among overweight/obese participants who consumed alcohol at the same level as normal weight participants. We found that overweight/obese participants who reported alcohol consumption above the guidelines had a greater HR for liver disease incidence and mortality (HR 1.52, 95% CI 1.32, 1.75 and HR 2.20, 95% CI 1.41, 3.44, respectively) than normal weight individuals (HR 0.95, 95% CI 0.83, 1.09 and HR 1.24, 95% CI 0.8, 1.93, respectively). The results for the associations of alcohol consumption and WC with ALD, NAFLD and liver disease mortality were similar. Participants with high WC who reported alcohol consumption above the guidelines had a greater HR for liver disease incidence (HR 1.59, 95% CI 1.35, 1.87) than normal WC individuals (HR 0.85, 95% CI 0.72, 1.01).

Conclusions

We found evidence that being overweight/obese amplified the harmful effect of alcohol on the liver incidence and mortality.

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Fig. 1: Joint associations of alcohol consumption and adiposity on ALD, NAFLD and liver disease incidence.
Fig. 2: Joint associations of alcohol consumption and adiposity on ALD, NAFLD and liver disease mortality.

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Acknowledgements

We would like to thank the study participants for their time and the UK Biobank for making this invaluable data resource available to the global research community. ES is supported by a National Health and Medical Research Council Senior Research Fellowship; and a University of Sydney SOAR fellowship. The UK Biobank is an open-access resource. Bona fide researchers can apply to use the UK Biobank data set by registering and applying at http://www.ukbiobank.ac.uk/register-apply/.

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ES and EI-E: contributed to conception and design of the study; B-HH: performed statistical analyses with guidance from ES; EI-E: drafted the initial manuscript; ES, MA, NJ and EME: provided critical revision of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Elif Inan-Eroglu.

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Inan-Eroglu, E., Huang, BH., Ahmadi, M.N. et al. Joint associations of adiposity and alcohol consumption with liver disease-related morbidity and mortality risk: findings from the UK Biobank. Eur J Clin Nutr (2021). https://doi.org/10.1038/s41430-021-00923-4

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