Prevalence of age-related macular degeneration in a large European cohort: results from the population-based Gutenberg Health Study.

Authors:
Christina A Korb
Christina A Korb
Johannes Gutenberg-University Mainz
Germany
Ulrike B Kottler
Ulrike B Kottler
University Erlangen-Nürnberg
Erlangen | Germany
Christian Wolfram
Christian Wolfram
University Medical Center
Germany
Andreas Schulz
Andreas Schulz
University Medical Center Mainz
Germany
Isabella Zwiener
Isabella Zwiener
Institute for Medical Biostatistics
Germany
Philipp S Wild
Philipp S Wild
Center for Cardiology
Shawnee | United States
Norbert Pfeiffer
Norbert Pfeiffer
University Medical Center
Germany

Graefes Arch Clin Exp Ophthalmol 2014 Sep 25;252(9):1403-11. Epub 2014 Feb 25.

Department of Ophthalmology, University Medical Center, Johannes Gutenberg-University Mainz, Langenbeckstr.1, 55131, Mainz, Germany,

Background: The aim of this study was to describe the sex- and age-specific prevalence of age-related macular degeneration (AMD) and its correlation with urban or rural residence in a large and relatively young European cohort.

Methods: We evaluated fundus photographs from participants in the Gutenberg Health Study (GHS), a population-based, prospective, observational, single-centre study in the Rhineland-Palatine region in midwestern Germany. The participants were 35-74 years of age at enrolment. The fundus images were classified as described in the Rotterdam Study and were graded independently by two experienced ophthalmologists (CK and UBK) based on the presence of hard and soft drusen, retinal pigmentary abnormalities, and signs of atrophic or neovascular age-related macular generation (AMD).

Results: Photographs from 4,340 participants were available for grading. Small, hard drusen (<63 μm, stages 0b and 0c) were present in 37.4% of participants (95% confidence interval [CI], stage 0b, 31.6% [30.3-33.7]; stage 0c, 5.8% [5.1-6.5]). Early AMD (soft drusen, pigmentary abnormalities, stages 1-3) was present in 3.8% of individuals in the youngest age group (35-44 years) (95% CI, stage 1a, 0.4% [0.3-0.5%]; stage 1b, 3.2% [2.9-3.5%]; stage 2a, 0.1% [0.1-0.2%]; stage 2b, 0% [0-0.0%]; stage 3, 0.1% [0.1-0.2%]), whereas late AMD (stages 4a and 4b) did not appear in the youngest age group. In all age groups, signs of early AMD were detected in 11.9% of individuals (stage 1a, 2.1% [1.7-2.6]; stage 1b, 8.0% [7.2-8.8]; stage 2a, 1.0% [0.7-1.3]; stage 2b, 0.5% [0.3-0.7]; stage 3, 0.3% [0.2-0.6]). Late AMD (geographic atrophy or neovascular AMD) was found in 0.2% of individuals (stage 4a, 0.1 % [0.0-0.2]; stage 4b, 0.1% [0.0-0.2]). AMD increased significantly with age (odds ratio [OR], 1.09; 95% CI, 1.08-1.10). Sex, iris colour, and residence (rural vs. urban) were not associated with different rates of AMD.

Conclusions: In this study, the prevalence of AMD increased dramatically with age; however, although AMD is usually thought to occur after age 50, signs of early AMD were found in 3.8% of individuals in the youngest age group (younger than 45 years). This population-based sample is the first to provide substantial epidemiologic data from a large German cohort, including data on macular degeneration in younger age groups and incidence data after recall.

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http://link.springer.com/10.1007/s00417-014-2591-9
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http://dx.doi.org/10.1007/s00417-014-2591-9DOI Listing

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September 2014
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