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Outer retinal tubulation in the comparison of age-related macular degeneration treatments trials (CATT)
Journal article   Peer reviewed

Outer retinal tubulation in the comparison of age-related macular degeneration treatments trials (CATT)

Joo Yong Lee, Francisco A Folgar, Maureen G Maguire, Gui-shuang Ying, Cynthia A Toth, Daniel F Martin, Glenn J Jaffe and CATT Research Group
Ophthalmology (Rochester, Minn.), Vol.121(12), pp.2423-2431
12/2014
DOI: 10.1016/j.ophtha.2014.06.013
PMCID: PMC4254295
PMID: 25064723
url
http://doi.org/10.1016/j.ophtha.2014.06.013View
Open Access

Abstract

To determine the prevalence of, risk factors for, and visual acuity (VA) correlations with outer retinal tubulation (ORT) seen on spectral-domain optical coherence tomography (SD OCT) in eyes with neovascular age-related macular degeneration (AMD) after anti-vascular endothelial growth factor (VEGF) therapy. Prospective cohort study within a randomized clinical trial. Patients with SD OCT images at weeks 56 and 104 in the Comparison of AMD Treatments Trials (CATT). Participants in the CATT were assigned randomly to ranibizumab (0.5 mg) or bevacizumab (1.25 mg) treatment and to a monthly or pro re nata (PRN) injection-dosing regimen. A subset of eyes was imaged with SD OCT beginning at week 56. Cirrus 512×128 or Spectralis 20°×20° volume cube scan protocols were used to acquire SD OCT images. Two independent readers at the CATT OCT reading center graded scans, and a senior reader arbitrated discrepant grades. The prevalence of ORT, identified as tubular structures seen on at least 3 consecutive Cirrus B scans or 2 consecutive Spectralis B scans, was determined. The associations of patient-specific and ocular features at baseline and follow-up with ORT were evaluated by univariate and multivariate analyses. Outer retinal tubulations. Seven of 69 eyes (10.1%) at 56 weeks and 64 of 368 eyes (17.4%) at week 104 had ORTs. Absence of diabetes, poor VA, blocked fluorescence, geographic atrophy, greater lesion size, and presence of subretinal hyperreflective material at baseline were associated independently with greater risk of ORT at 104 weeks (P < 0.05). Neither drug nor dosing regimen were associated significantly with ORT. The mean VA of eyes with ORT at week 104 (58.5 Early Treatment Diabetic Retinopathy Study letters) was worse than the mean VA of eyes without ORT (68.8 letters; P < 0.0001). At 2 years after initiation of anti-VEGF therapy for neovascular AMD, ORTs are present in a substantial proportion of eyes. We identified baseline features that independently predict ORTs. It is important to identify ORTs because eyes with ORTs have worse VA outcomes than those without this finding.
Prevalence Prospective Studies Humans Male Retinal Photoreceptor Cell Outer Segment - pathology Vascular Endothelial Growth Factor A - antagonists & inhibitors Retinal Diseases - epidemiology Macular Degeneration - drug therapy Bevacizumab Choroidal Neovascularization - drug therapy Choroidal Neovascularization - pathology Retinal Diseases - etiology Ranibizumab Angiogenesis Inhibitors - therapeutic use Retinal Diseases - pathology Female Angiogenesis Inhibitors - adverse effects Antibodies, Monoclonal, Humanized - adverse effects Antibodies, Monoclonal, Humanized - therapeutic use Tomography, Optical Coherence Risk Factors Visual Acuity Analysis of Variance Aged Macular Degeneration - pathology

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