title: DIAGNOSTIC ACCURACY EVALUATION OF VISUAL ACUITY AND FUNDUS AUTOFLUORESCENCE MACULAR GEOGRAPHIC ATROPHY AREA FOR THE DISCRIMINATION OF STARGARDT GROUPS.
abstract: OBJECTIVE
  To evaluate diagnostic accuracy of visual acuity and fundus autofluorescence (FAF) macular geographic atrophy (GA) area for the discrimination of autosomal recessive Stargardt groups.
  
  
  METHODS
  Subjects aged <50 years old with confirmed molecular diagnoses were classified to Groups 1, 2, or 3 according to a full-field electroretinogram reference standard. Diagnostic accuracy of visual acuity and the FAF macular GA area was assessed with generalized estimating equations, receiver operating characteristic curve area under the curve, and support vector machines.
  
  
  RESULTS
  Ten eyes were classified as Group 1 and 7 as Group 2. The mean log minimum angle resolution (Snellen equivalent) was 0.64 (20/87) for group 1 and 0.96 (20/182) for group 2. Mean FAF macular GA area was 0.96 mm for Group 1 and 3.23 mm for Group 2. The generalized estimating equation analysis showed an 8.3% increase in odds of Group 2 classification with each 0.1-unit increase in log minimum angle resolution and a 24% increase with each 1-mm increase in FAF macular GA area. Multivariate generalized estimating equation analysis showed that only the FAF macular GA area was significant. Area under the curve was 0.79 for log minimum angle resolution and 0.89 for FAF macular GA area. The support vector machine classification accuracy was 71% for log minimum angle resolution and 82% for FAF macular GA area.
  
  
  CONCLUSIONS
  Visual acuity and FAF macular GA area had good independent accuracy for the discrimination of groups 1 and 2, indicating that they may serve as useful diagnostic parameters.
authors.affiliation: *Bernard & Shirlee Brown Glaucoma Laboratory and Barbara & Donald Jonas Stem Cell Laboratory, Edward S. Harkness Eye Institute, Columbia University College of Physicians and Surgeons, New York, New York; †Department of Ophthalmology, New York University School of Medicine, New York, New York; and ‡Institute of Human Nutrition, Department of Pathology and Cell Biology, Columbia University College of Physicians and Surgeons, New York, New York.
authors.forename: Rony
authors.initials: R
authors.lastname: Gelman
authors.forename: R Theodore
authors.initials: RT
authors.lastname: Smith
authors.forename: Stephen H
authors.initials: SH
authors.lastname: Tsang
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000235:genetics; D000293:Adolescent; D000328:Adult; D004252:DNA Mutational Analysis; D004596:Electroretinography; D005260:Female; D005654:Fundus Oculi; D057092:Geographic Atrophy / Q000175:diagnosis* / Q000235:genetics / Q000503:physiopathology; D006801:Humans; D008268:Macular Degeneration / Q000151:congenital* / Q000175:diagnosis / Q000235:genetics / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009154:Mutation; D061848:Optical Imaging; D012372:ROC Curve; D015203:Reproducibility of Results; D012189:Retrospective Studies; D000080362:Stargardt Disease; D014792:Visual Acuity / Q000502:physiology*
chemical_list: C056475:ABCA4 protein, human; D018528:ATP-Binding Cassette Transporters
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