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Diet, vegetarianism, and cataract risk
Paul N Appleby1, Naomi E Allen, Timothy J Key
1Cancer Epidemiology Unit, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, United Kingdom. paul.appleby@ceu.ox.ac.uk
The American Journal of Clinical Nutrition
|March 25, 2011
Summary
Vegetarians and vegans had significantly lower cataract risk compared to meat eaters. This study highlights diet group as a key factor in age-related cataract development.
Area of Science:
- Ophthalmology
- Nutritional Science
- Epidemiology
Background:
- Age-related cataract is a significant cause of vision impairment.
- Previous research on diet and cataract risk has overlooked distinct dietary patterns, such as vegetarianism.
- Understanding dietary influences on cataract is crucial for public health initiatives.
Purpose of the Study:
- To investigate the association between various dietary groups and the risk of developing cataract.
- To examine cataract risk across a spectrum of diets, including high meat consumption, low meat consumption, fish consumption, vegetarian, and vegan patterns.
- To analyze these associations within a large cohort with diverse dietary habits.
Main Methods:
- Utilized Cox proportional hazards regression analysis.
- Examined baseline dietary and lifestyle factors of 27,670 non-diabetic participants (aged ≥40 years).
- Data sourced from the European Prospective Investigation into Cancer and Nutrition (EPIC-Oxford) cohort and UK health records.
Main Results:
- A significant inverse relationship was observed between adherence to meat-free diets and cataract risk.
- Incidence rate ratios (IRRs) for cataract decreased progressively from high meat eaters to vegans.
- Vegetarians (IRR: 0.70) and vegans (IRR: 0.60) showed substantially lower cataract risk compared to high meat eaters (IRR: 1.00).
Conclusions:
- Vegetarian and vegan diets are associated with a reduced risk of age-related cataract.
- Dietary patterns, specifically reduced meat consumption, play a role in cataract prevention.
- Findings suggest that promoting plant-based diets may help mitigate cataract morbidity.
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