title: Features of Age-Related Macular Degeneration in the General Adults and Their Dependency on Age, Sex, and Smoking: Results from the German KORA Study.
abstract: Age-related macular degeneration (AMD) is a vision impairing disease of the central retina characterized by early and late forms in individuals older than 50 years of age. However, there is little knowledge to what extent also younger adults are affected. We have thus set out to estimate the prevalence of early AMD features and late AMD in a general adult population by acquiring color fundus images in 2,840 individuals aged 25 to 74 years of the Cooperative Health Research in the Region of Augsburg project (KORA) in South Germany. Among the 2,546 participants with gradable images for each eye, 10.9% (n = 277) had early AMD features (applying the 9-step Age-Related Eye Disease Study Severity Scale), 0.2% (n = 6) had late AMD. Prevalence increased with age, reaching 26.3% for early AMD features and 1.9% for late AMD at the age 70+. However, signs of early AMD were found in subjects as young as 25 years, with the risk for early AMD features increasing linearly by years of age in men, and, less consistent with a linear increase, in women. Risk for early AMD features increased linearly by pack years of smoking in men, not in women, nor was there any association with other lifestyle or metabolic factors. By providing much sought-after prevalence estimates for AMD from Central Europe, our data underscores a substantial proportion of the adult population with signs of early AMD, including individuals younger than 50 years. This supports the notion that early AMD features in the young might be under-acknowledged.
authors.affiliation: Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany.|Department of Ophthalmology, University Hospital Regensburg, Regensburg, Germany.|Institute of Human Genetics, University of Regensburg, Regensburg, Germany.
authors.forename: Caroline
authors.initials: C
authors.lastname: Brandl
authors.affiliation: Institute of Human Genetics, University of Regensburg, Regensburg, Germany.
authors.forename: Valentin
authors.initials: V
authors.lastname: Breinlich
authors.affiliation: Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany.
authors.forename: Klaus J
authors.initials: KJ
authors.lastname: Stark
authors.affiliation: Statistical Consulting Unit StaBLab, Department of Statistics, Ludwig-Maximilians-University Munich, Germany.
authors.forename: Sabrina
authors.initials: S
authors.lastname: Enzinger
authors.affiliation: Statistical Consulting Unit StaBLab, Department of Statistics, Ludwig-Maximilians-University Munich, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Aßenmacher
authors.affiliation: Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Olden
authors.affiliation: Institute of Human Genetics, University of Regensburg, Regensburg, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Grassmann
authors.affiliation: Institute of Developmental Genetics, Helmholtz-Zentrum München, Neuherberg, Germany.
authors.forename: Jochen
authors.initials: J
authors.lastname: Graw
authors.affiliation: Institute for Epidemiology II, Helmholtz-Zentrum München, Neuherberg, Germany.
authors.forename: Margit
authors.initials: M
authors.lastname: Heier
authors.affiliation: Institute for Epidemiology II, Helmholtz-Zentrum München, Neuherberg, Germany.
authors.forename: Annette
authors.initials: A
authors.lastname: Peters
authors.affiliation: Department of Ophthalmology, University Hospital Regensburg, Regensburg, Germany.
authors.forename: Horst
authors.initials: H
authors.lastname: Helbig
authors.affiliation: Statistical Consulting Unit StaBLab, Department of Statistics, Ludwig-Maximilians-University Munich, Germany.
authors.forename: Helmut
authors.initials: H
authors.lastname: Küchenhoff
authors.affiliation: Institute of Human Genetics, University of Regensburg, Regensburg, Germany.
authors.forename: Bernhard H F
authors.initials: BH
authors.lastname: Weber
authors.affiliation: Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany.|Institute of Genetic Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.
authors.forename: Iris M
authors.initials: IM
authors.lastname: Heid
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D005858:Germany / Q000453:epidemiology; D006306:Health Surveys; D006801:Humans; D008268:Macular Degeneration / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000009:adverse effects*