title: [The prevalence of primary angle-closure glaucoma and its causes in rural area of Shuangyang district in Changchun, Jilin province].
abstract: OBJECTIVE
  To investigate the prevalence of primary angle-closure glaucoma (PACG) and its causes in a rural area in Changchun, China.
  
  
  METHODS
  From the rural area of Qijiaxiang, Shuangyang district of Changchun, 1139 individuals aged 40 years and above were randomly selected for the study from September 2004 to February 2005 using Zhao Jialiang's standard. All subjects in this study underwent a preliminary screening examination including visual acuity, the peripheral depth of anterior chamber, slit lamp, tonometry and fundus. The suspects of PACG were asked to repeat the following examinations: tonometry, gonioscopy, fundus, and visual field assessment.
  
  
  RESULTS
  1139 of 1528 subjects were invited to participate in the study (response rate 74.5%). In those age 40 years and above, the prevalence of PACG was 1.5% in men, 3.5% in women, and 2.5% in general population, respectively. The prevalence was increased with age. The anterior chamber was significantly (P<0.01) narrower in the female group than in the male group when the peripheral depth of anterior chamber was compared. The prevalence of PACG was significantly (P<0.02) higher in subjects with positive family history than with negative family history.
  
  
  CONCLUSIONS
  In the rural area in Shuangyang district of Changchun, the prevalence of PACG is higher than other regions surveyed in China. Sex, age, family history and the peripheral depth of anterior chamber are significant risk factors in PACG.
authors: Department of Ophthalmology, the 2nd Affiliated Hospital, Harbin Medical University, Harbin 150086, China. yuanhp@yahoo.com.cn
authors: Hui-ping
authors: HP
authors: Yuan
authors: Hong
authors: H
authors: Yu
authors: Zheng
authors: Z
authors: Xiao
authors: Zheng-bo
authors: ZB
authors: Shao
authors: Xiao-li
authors: XL
authors: Zhang
authors: Bin-bin
authors: BB
authors: Yang
authors: Hong
authors: H
authors: Sui
authors: Ya-shuang
authors: YS
authors: Zhao
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012424:Rural Population; D017678:Sex Distribution