title: Incidence of and factors associated with glaucoma after surgery for congenital cataract: findings from the British Congenital Cataract Study.
abstract: OBJECTIVE
  To report the incidence of and factors associated with postoperative open-angle glaucoma in a nationally representative group of children undergoing surgery for congenital or infantile cataract.
  
  
  METHODS
  Noncomparative interventional cohort study.
  
  
  METHODS
  All children in the United Kingdom who were newly diagnosed with congenital or infantile cataract in a 12-month period in 1995 and 1996 (the British Congenital/Infantile Cataract Study) were eligible for this study. One hundred sixty-five children with congenital or infantile cataract underwent cataract surgery.
  
  
  METHODS
  All the children were traced through their managing ophthalmologists. Standardized outcome data were collected at least 6 years after diagnosis. For children undergoing cataract extraction, Cox regression analysis was performed to determine incidence of postoperative open-angle glaucoma and the effect of key factors considered, a priori, potentially to be associated with it (i.e., age at detection and surgery, type of cataract surgery, primary intraocular lens implantation, severe postoperative uveitis, and microphthalmia).
  
  
  METHODS
  Development of open-angle glaucoma after cataract surgery.
  
  
  RESULTS
  Postoperative glaucoma developed in 27 of 275 eyes of 165 children who underwent cataract surgery. The overall annual incidence of postoperative glaucoma was 5.25 per 100 cataract operations. The median time to development of postoperative glaucoma was 1.34 years (range, 0.39 months-6.73 years). Younger age at detection of cataract was the only factor independently associated with the development of glaucoma when all other factors of interest (which were all statistically associated with age at detection) were accounted for. A 10-fold increase in the age at detection (for example, 30 days compared with 3 days) was associated with a 64% decrease in the hazard ratio (95% confidence interval, 41%-79%; P<0.001).
  
  
  CONCLUSIONS
  Median time to development of postoperative open-angle glaucoma in the present study was lower than that reported previously, emphasizing the need for vigilance from the early postoperative period. Earlier detection of cataract was the only significant factor associated with the development of glaucoma after surgery for congenital cataract.
authors.affiliation: Centre for Paediatric Epidemiology, Institute of Child Health, London, United Kingdom.
authors.forename: Melanie
authors.initials: M
authors.lastname: Chak
authors.forename: Jugnoo Sangeeta
authors.initials: JS
authors.lastname: Rahi
mesh_terms: D000367:Age Factors; D002386:Cataract / Q000151:congenital*; D002387:Cataract Extraction; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D005902:Glaucoma, Open-Angle / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011183:Postoperative Complications; D016016:Proportional Hazards Models; D012307:Risk Factors; D013997:Time Factors; D006113:United Kingdom / Q000453:epidemiology; D014792:Visual Acuity