title: Features of optical coherence tomography are predictive of visual outcomes after intravitreal bevacizumab injection for diabetic macular edema.
abstract: OBJECTIVE
  To identify optical coherence tomography (OCT) patterns of diabetic macular edema (DME) predictive of visual outcomes after intravitreal bevacizumab (IVB; Avastin®) injection.
  
  
  METHODS
  We retrospectively examined 56 consecutive eyes that were given IVB injections for DME alongside the preoperative macular OCT data. Using this information, we categorized the eyes into 2 groups: group 1 showing diffuse patterns; group 2 demonstrating cystoid macular edema (CME).
  
  
  RESULTS
  The mean follow-up period was 11.66 ± 3.98 months. Group 1 eyes gained 0.04 ± 9.27 ETDRS letters (p = 0.984), while group 2 eyes gained 5.79 ± 9.98 ETDRS letters (p = 0.005). Mean macular thickness decreased by 72.79 ± 145.74 μm in group 1 (p = 0.014) and by 223.71 ± 224.52 μm in group 2 (p< 0.001).
  
  
  CONCLUSIONS
  Patients showing CME upon OCT achieved greater improvements in visual acuity and macular thickness after IVB injection than patients with diffuse macular edema. The type of macular edema shown by OCT may provide an objective guideline in predicting the response of DME to IVB injection.
authors.affiliation: Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Mi In
authors.initials: MI
authors.lastname: Roh
authors.forename: Ji Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: Oh Woong
authors.initials: OW
authors.lastname: Kwon
mesh_terms: D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000008:administration & dosage*; D061067:Antibodies, Monoclonal, Humanized; D000068258:Bevacizumab; D003930:Diabetic Retinopathy / Q000175:diagnosis / Q000188:drug therapy* / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D056965:Injections, Intraocular; D008269:Macular Edema / Q000175:diagnosis / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence; D016896:Treatment Outcome; D042461:Vascular Endothelial Growth Factor A / Q000037:antagonists & inhibitors*; D014792:Visual Acuity / Q000187:drug effects; D014822:Vitreous Body
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D042461:Vascular Endothelial Growth Factor A; D000068258:Bevacizumab