title: Prevalence and incidence of ocular trauma in North China: the Beijing Eye Study.
abstract: OBJECTIVE
  To determine the prevalence and incidence of ocular trauma and proportion of trauma-related visual impairment in the population of Greater Beijing.
  
  
  METHODS
  The population-based Beijing Eye Study included 4439 subjects in 2001, of whom 3251 subjects returned for follow-up examination in 2006 (response rate: 73.3%). The subjects underwent a comprehensive ocular evaluation. Prospective information on ocular trauma and type of treatment was recorded with questionnaires in face-to-face interviews.
  
  
  RESULTS
  A history of ocular trauma was reported by 72 (1.6 ± 0.2%) subjects (age-standardized prevalence: 1.7 ± 0.01%). Prevalence of ocular trauma history was associated with male gender (p = 0.02), rural residence (p = 0.04) and alcohol consumption (p = 0.01). Trauma as underlying cause for visual impairment (best-corrected visual acuity < 20/60 and ≥ 20/400) was found in 4 (6.6%) eyes and as underlying cause for blindness (best-corrected visual acuity <20/400) in three eyes (4.2%). In the survey of 2006, 116 (3.6 ± 0.3%) participants had a self-reported history of ocular trauma, which was associated with male gender (p = 0.002), low income (p = 0.01) and alcohol consumption (p = 0.016). The 5-year incidence of ocular trauma was 2.6 ± 0.3%, which was associated with male gender (p = 0.02), younger age (p = 0.037) and lower income (p = 0.009).
  
  
  CONCLUSIONS
  In the adult population of Greater Beijing with an age of 40+ years, the prevalence of ocular trauma was 1.6 ± 0.2% and was associated with male gender, rural residence and alcohol consumption. The age-standardized ocular trauma prevalence of 1.7 ± 0.01% was comparable with figures from Caucasian populations. The 5-year incidence of ocular trauma of 2.6 ± 0.3% was associated with male gender, younger age and lower income.
authors: Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, China.
authors: Jin D
authors: JD
authors: Wang
authors: Liang
authors: L
authors: Xu
authors: Ya X
authors: YX
authors: Wang
authors: Qi S
authors: QS
authors: You
authors: Jing S
authors: JS
authors: Zhang
authors: Jost B
authors: JB
authors: Jonas
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D005131:Eye Injuries / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D012307:Risk Factors; D012424:Rural Population / Q000706:statistics & numerical data; D017678:Sex Distribution; D011795:Surveys and Questionnaires; D014505:Urban Population / Q000706:statistics & numerical data; D014786:Vision Disorders / Q000453:epidemiology*; D014792:Visual Acuity / Q000502:physiology; D019987:Persons with Visual Disabilities / Q000706:statistics & numerical data*