title: Discriminating ability of optical coherence tomography data in staging glaucomatous damage.
abstract: OBJECTIVE
  To evaluate the ability of retinal nerve fibre layer (RNFL) thickness and optic nerve head (ONH) measurements, as determined by optical coherence tomography (OCT), to discriminate between normal eyesight and glaucoma and also among the different stages of glaucoma.
  
  
  METHODS
  Observational cross-sectional study.
  
  
  METHODS
  Eighty-one controls and 213 glaucoma patients were enrolled in the study.
  
  
  METHODS
  The discriminating powers of OCT parameters for the detection of glaucoma and subgroups were compared by the area under the receiver operating characteristic (AUROC) curves.
  
  
  RESULTS
  The best RNFL thickness parameters for discriminating between early glaucoma and control eyes were inferior (0.74 [SE 0.04] microm), average (0.74 [SD 0.03] microm), and superior (0.68 [SD 0.03] microm). Among the ONH parameters, the best AUROC curve values were cup area (0.83 [SD 0.33]), cup/disc (C/D) area ratio (0.82 [SD 0.03]), and vertical integrated rim area (VIRA) (0.82 [SD 0.03]). The best AUROC values belonged to the RNFL thickness and were inferior (0.80 [SD 0.03]), superior (0.79 [SD 0.03]), and 6 o'clock (0.78 [SD 0.03]). The highest AUROC values were horizontal integrated rim width (HIRW) (0.74 [SD 0.04]), VIRA (0.64 [SD 0.04]), and rim area (0.63 [SD 0.04]) among the ONH parameters for early versus moderate glaucoma. The best AUROC values were inferior (0.81 [SD 0.03]), 6 o'clock (0.79 [SD 0.03]), and superior (0.78 [SD 0.04]) among the RNFL, and the best AUROC values were cup area (0.81 [SD 0.03]), VIRA (0.81 [SD 0.03]), and C/D area ratio (0.80 [SD 0.03]) among the ONH parameters, for moderate versus advanced glaucoma.
  
  
  CONCLUSIONS
  RNFL and ONH OCT parameters might provide information for determining glaucomatous damage.
authors.affiliation: Department of Ophtalmology, Kocaeli University Medical School, Izmit, Turkey. nursencemre@e-kolay.net
authors.forename: Nursen
authors.initials: N
authors.lastname: Yüksel
authors.forename: Ozgül
authors.initials: O
authors.lastname: Altintas
authors.forename: Berna
authors.initials: B
authors.lastname: Ozkan
authors.forename: Serhat
authors.initials: S
authors.lastname: Karadag
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Caglar
mesh_terms: D003430:Cross-Sectional Studies; D005260:Female; D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009412:Nerve Fibers / Q000473:pathology*; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D011379:Prognosis; D012372:ROC Curve; D015203:Reproducibility of Results; D012165:Retinal Ganglion Cells / Q000473:pathology*; D012720:Severity of Illness Index; D041623:Tomography, Optical Coherence / Q000379:methods*; D014794:Visual Fields