title: A cost-utility analysis of interventions for severe proliferative vitreoretinopathy.
abstract: OBJECTIVE
  The purpose of this study was to report a reference case, patient preference-based, incremental, cost-utility analysis for treatments of retinal detachment associated with severe proliferative vitreoretinopathy (PVR).
  
  
  METHODS
  Computer-based economic model utilizing data from the Medicare health insurance system in the United States.
  
  
  METHODS
  A cost-utility analysis compared vitreoretinal surgery using expanding gases and silicone oil therapy to the natural course of retinal detachment associated with severe PVR. The model applies long-term published visual data from the Silicone Study Group, time tradeoff utility analysis, decision analysis with Markov modeling, and discounting of costs and health benefits as per the Panel on Cost-Effectiveness in Health and Medicine. The major outcome measure was in year 2000 United States dollars per quality-adjusted life-year (dollars/QALY) gained.
  
  
  RESULTS
  Vitreoretinal surgery for retinal detachment complicated by severe PVR, as compared with no treatment, resulted in a mean gain of 0.128-0.200 discounted (3% annual rate) quality-adjusted life-years per treated patient. Silicone oil (dollars/QALY gained of 40,252 dollars) was slightly more cost-effective than perfluoropropane (C(3)F(8)) gas (dollars/QALY gained of 46,926 dollars) in eyes with PVR without previous vitrectomy, whereas C(3)F(8) gas (dollars/QALY gained of 46,162 dollars) was more cost-effective than silicone oil (dollars/QALY gained of 62,383 dollars) with previous vitrectomy and PVR. Sensitivity analysis resulted in a dollars/QALY gained of 13,347 dollars when 10% of opposite eyes had a severe visual loss to 202,128 dollars when a discount rate of 10% was utilized and opposite eyes initially had good vision.
  
  
  CONCLUSIONS
  The incremental expense of interventions for retinal detachment associated with PVR is cost-effective when compared with other widely accepted interventional therapies across diverse medical specialties.
authors.affiliation: Center for Evidence-Based Health Care Economics, Flourtown, Pennsylvania 19031, USA. Gary0514@aol.com
authors.forename: Gary C
authors.initials: GC
authors.lastname: Brown
authors.forename: Melissa M
authors.initials: MM
authors.lastname: Brown
authors.forename: Sanjay
authors.initials: S
authors.lastname: Sharma
authors.forename: Brandon
authors.initials: B
authors.lastname: Busbee
authors.forename: Jennifer
authors.initials: J
authors.lastname: Landy
mesh_terms: D003198:Computer Simulation; D003362:Cost-Benefit Analysis; D003663:Decision Trees; D005466:Fluorocarbons; D006801:Humans; D008390:Markov Chains; D006278:Medicare; D008875:Middle Aged; D018803:Models, Economic; D019057:Quality-Adjusted Life Years; D012163:Retinal Detachment / Q000191:economics* / Q000209:etiology / Q000601:surgery; D012680:Sensitivity and Specificity; D012827:Silicone Oils; D014481:United States; D014792:Visual Acuity; D014821:Vitrectomy / Q000191:economics; D018630:Vitreoretinopathy, Proliferative / Q000150:complications / Q000191:economics* / Q000601:surgery
chemical_list: D005466:Fluorocarbons; D012827:Silicone Oils; C042852:perflutren