title: Epidemiologic characteristics of rhegmatogenous retinal detachment in Kumamoto, Japan.
abstract: BACKGROUND
  The epidemiology of rhegmatogenous retinal detachment in Asians is not well known. We studied the epidemiologic characteristics of rhegmatogenous retinal detachment in Kumamoto, Japan.
  
  
  METHODS
  The study was based on a retrospective chart review of hospital patients who were treated for primary rhegmatogenous retinal detachment in 1990. The data were collected from seven hospitals in the Kumamoto area.
  
  
  RESULTS
  From a population of 1 840 000, 192 residents developed retinal detachment. The annual incidence was therefore 10.4 per 100 000 population (9.6 for males, 11.2 for females). The incidences of three types of detachment-nontraumatic phakic, aphakic, and blunt trauma--were 9.8, 0.5 and 0.2 per 100 000 population, respectively. In 109 of 180 patients (60.6%) with nontraumatic phakic detachment, retinal breaks were associated with lattice degeneration. In females, 14 of 106 nontraumatic phakic cases (13.2%) were secondary to macular holes.
  
  
  CONCLUSIONS
  Compared with previously published studies from other countries, the incidence of detachments associated with lattice degeneration and macular hole was higher, while the incidences of aphakic detachment and detachment due to blunt trauma were lower in Japan. Racial factors and living habits may affect the development of retinal detachment.
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sasaki
authors.forename: H
authors.initials: H
authors.lastname: Ideta
authors.forename: J
authors.initials: J
authors.lastname: Yonemoto
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
authors.forename: A
authors.initials: A
authors.lastname: Hirose
authors.forename: C
authors.initials: C
authors.lastname: Oka
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction; D002648:Child; D002675:Child, Preschool; D005131:Eye Injuries / Q000150:complications; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012163:Retinal Detachment / Q000145:classification / Q000453:epidemiology* / Q000209:etiology; D012167:Retinal Perforations / Q000150:complications; D012189:Retrospective Studies; D012307:Risk Factors; D014949:Wounds, Nonpenetrating / Q000150:complications