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Clin Nutr. 2019 Mar 16. pii: S0261-5614(19)30122-0. doi: 10.1016/j.clnu.2019.03.009. [Epub ahead of print]

Consumption of eggs and the 15-year incidence of age-related macular degeneration.

Author information

1
Centre for Vision Research, Department of Ophthalmology, Westmead Institute for Medical Research, University of Sydney, NSW, Australia. Electronic address: bamini.gopinath@sydney.edu.au.
2
Centre for Vision Research, Department of Ophthalmology, Westmead Institute for Medical Research, University of Sydney, NSW, Australia.
3
Faculty of Health Sciences, University of Sydney, Sydney, NSW, Australia; Westmead Hospital, Western Sydney Local Health District, Westmead, NSW, Australia.

Abstract

BACKGROUND AND AIMS:

A naturally rich source of lutein and zeaxanthin are eggs. There is scarce epidemiological data on the temporal association between total egg consumption and age-related macular degeneration (AMD) incidence. We aimed to establish the prospective and independent association between consumption of eggs with the incidence of AMD over a 15-year follow-up.

METHODS:

In this population-based cohort study of 3,654 participants aged 49 + years examined at baseline, 2034 participants had complete information on baseline egg consumption and AMD signs over 15 years. AMD was determined from retinal photographs. Egg consumption was assessed using a semi-quantitative food-frequency questionnaire. Total egg intake was calculated through summing up intakes in all forms e.g. boiled, poached, fried, scrambled and/or omelette. We summarized total egg consumption into the following categories: ≤1 egg/week; 2-4 eggs/week; 5-6 eggs/week; and ≥1 egg/day.

RESULTS:

At baseline, participants who consumed 2-4 eggs/week compared to those who consumed ≤1 egg/week (reference group) had reduced risk of incident late-stage AMD after 15 years: multivariable-adjusted odds ratio, OR, 0.51 (95% confidence intervals, CI, 0.28-0.92). Participants who consumed 2-4 eggs/week versus ≤1 egg/week at baseline had 62% reduced risk of developing neovascular AMD. Among those whose AMD onset was at or before the 10-year follow-up, consumption of 2-4 and 5-6 eggs/week was associated with 54% and 65% reduced risk of incident late AMD, respectively. When analyzed as a dichotomized variable, participants who consumed >1 egg/week versus ≤1 egg/week at baseline, had 46% reduced risk of developing late-stage AMD 15 years later: multivariable-adjusted OR 0.54 (95% CI 0.3-0.90). Non-significant associations were observed between egg consumption and incident early AMD.

CONCLUSIONS:

Our findings suggest that moderate consumption of eggs significantly reduces the risk of developing incident late-stage AMD over 15 years.

KEYWORDS:

Age-related macular degeneration; Blue Mountains eye study; Eggs; Incidence

PMID:
30914217
DOI:
10.1016/j.clnu.2019.03.009

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