title: Appositional suprachoroidal hemorrhage: a case-control study.
abstract: OBJECTIVE
  To identify the risk factors, prognostic factors, and clinical outcomes of patients with perioperative appositional suprachoroidal hemorrhage (ASCH).
  
  
  METHODS
  Case-control study.
  
  
  METHODS
  Tertiary referral center.
  
  
  METHODS
  Subjects included all patients with perioperative ASCH documented by B-scan ultrasound between May 1990 and March 2001. Two or three control patients were selected for each case, matched by surgeon, procedure, and date of surgery within 1 month. Surgery was performed as necessary. main outcome measures. The odds of ASCH associated with clinical risk factors. secondary outcome measure: visual acuity.
  
  
  RESULTS
  Thirty-seven cases with ASCH were identified. Ninety-two procedure- and surgeon-matched control subjects (2.48:1) were selected. Twenty-six cases (71%) of ASCH were related to a glaucoma operation. Risk factors for the development of ASCH included previous vitrectomy (P = .003, odds ratio of 12) and older age (P = .007, odds ratio 1.57/decade of increasing age). Hypertension was found to be protective (P = .02, odds ratio of 0.33). Factors associated with a poor visual outcome in patients with ASCH included apposition >30 days (P = .01), history of uveitis (P = .04), history of dry age-related macular degeneration (P = .05), and history of extracapsular cataract extraction (P = .05). Median pre-ASCH visual acuity was 20/100, and final median visual acuity was 20/1600.
  
  
  CONCLUSIONS
  Risk factors for the development of ASCH include previous vitrectomy and older age. Patients with these risk factors should be informed of their greater chance of poor visual acuity and anatomic outcomes secondary to the development of ASCH.
authors.affiliation: Stanford University Department of Ophthalmology, Stanford, California, USA.
authors.forename: Darius M
authors.initials: DM
authors.lastname: Moshfeghi
authors.forename: Brian Y
authors.initials: BY
authors.lastname: Kim
authors.forename: Peter K
authors.initials: PK
authors.lastname: Kaiser
authors.forename: Jonathan E
authors.initials: JE
authors.lastname: Sears
authors.forename: Scott D
authors.initials: SD
authors.lastname: Smith
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D002832:Choroid Hemorrhage / Q000175:diagnosis / Q000209:etiology / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011379:Prognosis; D012307:Risk Factors; D014786:Vision Disorders / Q000209:etiology; D014792:Visual Acuity; D014821:Vitrectomy