This comparative effectiveness research proposal aims to support a multicenter, prospective, randomized, NIH-defined phase 1 clinical trial to compare treatment protocols for decreased vision due to macular edema secondary to central retinal vein occlusion (CRVO) based on results of recent randomized trials.This application is an investigator-initiated project in response to Program Anouncement Number PAR-10-207. The trial is designed to assess whether bevacizumab is non-inferior to aflibercept (with the ability to test for superiority) for the treatment of decreased vision attributable to macular edema due to CRVO. The primary aim is to test for non-inferiority based on mean change from baseline in visual acuity letter score at Month 6 for eyes randomized to intravitreal bevacizumab every 4 weeks compared with eyes randomized to intravitreal aflibercept every 4 weeks using a non-inferiority margin of 5 letters. Secondary aims are to: ? compare the bevacizumab and the aflibercept groups in central retinal thickness at Month 6 and change between baseline and Month 6 as measured with spectral domain optical coherence tomography (SD-OCT) ? assess Month 13 visual acuity and SD-OCT outcomes associated with different dosing strategies after Month 6 in participants who respond well (defined per protocol) to treatment ? assess Month 13 visual acuity and SD-OCT outcomes associated with alternative treatment strategies after Month 6 in participants who respond poorly (defined per protocol) to treatment ? compare rates of neovascular complications of CRVO in the bevacizumab vs. aflibercept groups ? add to our knowledge of the safety profile of these anti-vascular endothelial growth factor (anti-VEGF) medications in the setting of eyes with macular edema secondary to CRVO A total of 360 participants will be enrolled at approximately 80 clinical centers. Participants will be followed for 13 months, with assessments including Early Treatment Diabetic Retinopathy Study (ETDRS) visual acuity letter score, SD-OCT, stereoscopic fundus photography and, at selected sites, widefield fluorescein angiography. Potential adverse events will be monitored with respect to frequency and severity.

Public Health Relevance

Recent trials demonstrated the efficacy of aflibercept as a treatment for macular edema due to CRVO. If bevacizumab is demonstrated to be a non-inferior treatment, this would have important economic and public health implications as bevacizumab is about 40 times cheaper than aflibercept. The trial will also investigate whether the frequency of medication injections into the eye can be reduced in eyes that responded well to treatment, and the impact of alternative treatments in eves that did not respond well to initial treatment.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Cooperative Clinical Research--Cooperative Agreements (U10)
Project #
1U10EY023533-01
Application #
8552241
Study Section
Special Emphasis Panel (ZEY1-VSN (03))
Program Officer
Wideroff, Louise
Project Start
2013-09-30
Project End
2018-08-31
Budget Start
2013-09-30
Budget End
2014-08-31
Support Year
1
Fiscal Year
2013
Total Cost
$3,243,882
Indirect Cost
$1,112,313
Name
Pennsylvania State University
Department
Ophthalmology
Type
Schools of Medicine
DUNS #
129348186
City
Hershey
State
PA
Country
United States
Zip Code
17033
Scott, Ingrid U; VanVeldhuisen, Paul C; Ip, Michael S et al. (2016) SCORE2 Report 1: Techniques to Optimize Recruitment in Phase III Clinical Trials of Patients With Central Retinal Vein Occlusion. Am J Ophthalmol 170:25-31