title: Prevalence of and risk factors for age-related and anterior polar cataracts in a Korean population.
abstract: OBJECTIVE
  To investigate the potential risk factors associated with nuclear, cortical, posterior subcapsular, and anterior polar cataracts (APC) in the Korean population.
  
  
  METHODS
  This was a population-based, cross-sectional study of 7992 adults (over 40 years of age) from the data of the fourth annual Korea National Health and Nutrition Examination Survey, performed from 2007 to 2009. The presence of lens opacity was examined by slit-lamp biomicroscopy and evaluated according to LOCS II standard photographs. The subtype of cataract present, including nuclear, cortical, posterior subcapsular, and anterior polar cataracts, was noted. Multivariable adjusted logistic regression analysis was conducted to examine the odds ratio (OR) and 95% confidence interval (CI) for association of each specific type of cataract with age, sex, health examination, and medical history.
  
  
  RESULTS
  The prevalence of nuclear, cortical, and posterior subcapsular cataract increased gradually with increasing age. However, the prevalence of APC peaked in the 50- to 59-year-old subjects. All types of cataract except for APCs were more prevalent in women. Oral steroid use was associated with a lower risk of APC.
  
  
  CONCLUSIONS
  These findings showed the unique characteristics of APC in the Korean population.
authors.affiliation: Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea; Catholic Institutes of Visual Science, The Catholic University of Korea, Seoul, Korea; Department of Health Promotion Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Kyung-Sun
authors.initials: KS
authors.lastname: Na
authors.affiliation: Department of Biostatistics, The Catholic University of Korea, Seoul, Korea.
authors.forename: Yong-Gyu
authors.initials: YG
authors.lastname: Park
authors.affiliation: Department of Biostatistics, The Catholic University of Korea, Seoul, Korea.
authors.forename: Kyungdo
authors.initials: K
authors.lastname: Han
authors.affiliation: Catholic Institutes of Visual Science, The Catholic University of Korea, Seoul, Korea.
authors.forename: Jee Won
authors.initials: JW
authors.lastname: Mok
authors.affiliation: Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Choun-Ki
authors.initials: CK
authors.lastname: Joo
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D002386:Cataract / Q000151:congenital* / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D015995:Prevalence; D056910:Republic of Korea; D012307:Risk Factors