title: Corneal thickness and relating factors in a population-based study in Japan: the Tajimi study.
abstract: OBJECTIVE
  To evaluate central corneal thickness (CCT) in a Japanese population and to describe the relationship between CCT and other factors.
  
  
  METHODS
  Population-based cross-sectional study.
  
  
  METHODS
  Reliable CCT measurements were obtained using specular-type pachymetry from 2,868 persons 40 years or older selected randomly from the population of Tajimi City.
  
  
  RESULTS
  The CCT averaged 0.521 +/- 0.032 mm (mean +/- standard deviation). The CCT was thicker in men than in women (P < .001) and was correlated with age (right eyes only), height, weight, diastolic blood pressure, systolic blood pressure (left eyes only), intraocular pressure (IOP), and corneal curvature (P < .05, the Pearson correlation analyses). Multiple regression analysis showed that only gender, IOP, and corneal curvature were significantly (P < .011) associated with CCT.
  
  
  CONCLUSIONS
  The mean CCT obtained using an optical method in a Japanese population was 0.521 mm. The CCT was associated significantly with gender, IOP, and corneal curvature but not with age in multiple regression analyses.
authors.affiliation: Department of Ophthalmology, University of Tokyo Graduate School of Medicine, Tokyo, Japan. tomidokoro-tky@umin.ac.jp
authors.forename: Atsuo
authors.initials: A
authors.lastname: Tomidokoro
authors.forename: Makoto
authors.initials: M
authors.lastname: Araie
authors.forename: Aiko
authors.initials: A
authors.lastname: Iwase
mesh_terms: D000328:Adult; D001794:Blood Pressure; D001827:Body Height; D001835:Body Weight; D003315:Cornea / Q000033:anatomy & histology*; D003430:Cross-Sectional Studies; D005260:Female; D005902:Glaucoma, Open-Angle / Q000473:pathology; D006801:Humans; D007429:Intraocular Pressure; D007564:Japan; D008297:Male; D012737:Sex Factors; D014065:Tonometry, Ocular