Study to Assess the Efficacy, Safety, and Tolerability of Intravitreal Aflibercept Compared to Laser Photocoagulation in Patients With Retinopathy of Prematurity
BUTTERFLEYE
Randomized, Controlled, Multi-Center Study to Assess the Efficacy, Safety, and Tolerability of Intravitreal Aflibercept Compared to Laser Photocoagulation in Patients With Retinopathy of Prematurity
2 other identifiers
interventional
127
13 countries
52
Brief Summary
The primary objective of the study is to assess the efficacy of aflibercept compared to laser in patients diagnosed with retinopathy of prematurity (ROP). The secondary objectives of the study are to assess the need for a second treatment modality, to assess the recurrence of ROP in the study and to assess the safety and tolerability of aflibercept.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for phase_3
Started Oct 2019
Typical duration for phase_3
52 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
September 23, 2019
CompletedFirst Posted
Study publicly available on registry
September 24, 2019
CompletedStudy Start
First participant enrolled
October 30, 2019
CompletedPrimary Completion
Last participant's last visit for primary outcome
August 18, 2022
CompletedStudy Completion
Last participant's last visit for all outcomes
August 18, 2022
CompletedResults Posted
Study results publicly available
July 20, 2023
CompletedJuly 20, 2023
July 1, 2023
2.8 years
September 23, 2019
April 25, 2023
July 19, 2023
Conditions
Outcome Measures
Primary Outcomes (1)
Percentage of Participants With Absence of Active Retinopathy of Prematurity (ROP) and Unfavorable Structural Outcomes From Baseline to Week 52 of Chronological Age
Active ROP was ROP requiring treatment and unfavorable structural outcome was defined as retinal detachment, macular dragging, macular fold, or retrolental opacity. For participants with both eyes enrolled in the study, both eyes must have met the endpoint. Participants with only one study eye enrolled were responders if the respective eye responded.
Baseline to week 52 of chronological age
Secondary Outcomes (4)
Percentage of Participants Requiring Intervention With a Second Treatment Modality From Baseline to Week 52 of Chronological Age
Baseline to to week 52 of chronological age
Percentage of Participants With Recurrence of ROP Through Week 52 of Chronological Age
Baseline to week 52 of chronological age
Percentage of Participants With Ocular Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)
Baseline to Week 52 of chronological age
Percentage of Participants With Systematic (Non-ocular) TEAEs and TESAEs
Baseline to Week 52 of chronological age
Study Arms (2)
Aflibercept Group
EXPERIMENTALPatients will receive a single intravitreal (IVT) injection per eligible eye at baseline.
Laser Group
EXPERIMENTALPatients will undergo laser treatment in each eligible eye at baseline.
Interventions
Administered IVT
Transpupillary conventional laser will be administered according to standard local procedures.
Eligibility Criteria
You may qualify if:
- Gestational age at birth ≤ 32 weeks or birth weight ≤1500 g
- Patients with treatment-naïve retinopathy of prematurity (ROP) classified according to the International Classification for ROP in at least one eye as:
- Zone I Stage 1 plus, or 2 plus, or 3 non-plus or 3 plus, or
- Zone II Stage 2 plus or 3 plus, or
- Aggressive posterior retinopathy of prematurity (AP-ROP)
You may not qualify if:
- Known or suspected chromosomal abnormality, genetic disorder, or syndrome
- Previous exposure to any Intravitreal (IVT) or systemic anti-vascular endothelial growth factor (VEGF) agent, including maternal exposure during pregnancy and/or during breastfeeding
- Clinically significant neurological disease (eg, intraventricular hemorrhage grade 3 or higher, periventricular leukomalacia, congenital brain lesions significantly impairing optic nerve function, severe hydrocephalus with significantly increased intracranial pressure)
- Pediatric conditions rendering the infant ineligible for study intervention at baseline or for repeated blood draws as evaluated by a neonatal intensive care unit specialist and a study ophthalmologist
- Presence of active ocular infection within 5 days of the first treatment
- Advanced stages of ROP with partial or complete retinal detachment (ROP stage 4 and stage 5)
- ROP involving only Zone III
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (52)
Regeneron Study Site
Phoenix, Arizona, 85016, United States
Regeneron Study Site
La Jolla, California, 92093, United States
Regeneron Study Site
Loma Linda, California, 92354, United States
Regeneron Study Site
Orange, California, 92868, United States
Regeneron Study Site
Palo Alto, California, 94303, United States
Regeneron Study Site
San Diego, California, 92123, United States
Regeneron Study Site
San Francisco, California, 94143, United States
Regeneron Study Site
Gainesville, Florida, 32608, United States
Regeneron Study Site
Augusta, Georgia, 78705, United States
Regeneron Study Site
Chicago, Illinois, 60612, United States
Regeneron Study Site
Boston, Massachusetts, 02111, United States
Regeneron Study Site
Ann Arbor, Michigan, 48105, United States
Regeneron Study Site
Royal Oak, Michigan, 48073, United States
Regeneron Study Site
Brooklyn, New York, 11203, United States
Regeneron Study Site
Brooklyn, New York, 11213, United States
Regeneron Study Site
Buffalo, New York, 14209, United States
Regeneron Study Site
New York, New York, 10017, United States
Regeneron Study Site
New York, New York, 10029, United States
Regeneron Study Site
The Bronx, New York, 10462, United States
Regeneron Study Site
Valhalla, New York, 10595, United States
Regeneron Study Site
Cleveland, Ohio, 44106, United States
Regeneron Study Site
Oklahoma City, Oklahoma, 73104, United States
Regeneron Study Site
Providence, Rhode Island, 02905, United States
Regeneron Study Site
Austin, Texas, 78705, United States
Regeneron Study Site
San Antonio, Texas, 78229, United States
Regeneron Study Site
San Antonio, Texas, 78240, United States
Regeneron Study Site
Morgantown, West Virginia, 26506, United States
Regeneron Study Site
Sofia, 1407, Bulgaria
Regeneron Study Site
Sofia, 1504, Bulgaria
Regeneron Study Site
Varna, 9002, Bulgaria
Regeneron Study Site
Medellín, Antioquia, 50034, Colombia
Regeneron Study Site
Floridablanca, Santander Department, 681004, Colombia
Regeneron Study Site
Ostrava-Poruba, 708 52, Czechia
Regeneron Study Site
Debrecen, H-4032, Hungary
Regeneron Study Site
Iași, 700038, Romania
Regeneron Study Site
Saint Petersburg, Sankt-Peterburg, 194100, Russia
Regeneron Study Site
Moscow, 119571, Russia
Regeneron Study Site
Moscow, 119620, Russia
Regeneron Study Site
Bratislava, 833 40, Slovakia
Regeneron Study Site
Cheonan, 31151, South Korea
Regeneron Study Site
Kaohsiung City, 81346, Taiwan
Regeneron Study Site
Pathum Wan, Bangkok, 10330, Thailand
Regeneron Study Site
Ratchathewi, Bangkok, 10400, Thailand
Regeneron Study Site
Hat Yai, Changwat Songkhla, 90110, Thailand
Regeneron Study Site
Chiang Mai, Chiang Mai, 50200, Thailand
Regeneron Study Site
Khon Kaen, 40002, Thailand
Regeneron Study Site
Adana, 4522, Turkey (Türkiye)
Regeneron Study Site
Ankara, 06100, Turkey (Türkiye)
Regeneron Study Site
Ankara, 06560, Turkey (Türkiye)
Regeneron Study Site
Eskişehir, 26480, Turkey (Türkiye)
Regeneron Study Site
Ho Chi Minh City, 70000, Vietnam
Regeneron Study Site
Huế, 100000, Vietnam
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Results Point of Contact
- Title
- Clinical Trials Administrator
- Organization
- Regeneron Pharmaceuticals, Inc.
Study Officials
- STUDY DIRECTOR
Clinical Trial Management
Regeneron Pharmaceuticals
Publication Agreements
- PI is Sponsor Employee
- No
- Restriction Type
- OTHER
- Restrictive Agreement
- Yes
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- NONE
- Masking Details
- Open-Label
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
September 23, 2019
First Posted
September 24, 2019
Study Start
October 30, 2019
Primary Completion
August 18, 2022
Study Completion
August 18, 2022
Last Updated
July 20, 2023
Results First Posted
July 20, 2023
Record last verified: 2023-07
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL, SAP, ICF, CSR, ANALYTIC CODE
- Time Frame
- Individual anonymized participant data will be considered for sharing once the indication has been approved by a regulatory body, if there is legal authority to share the data and there is not a reasonable likelihood of participant re-identification.
- Access Criteria
- Qualified researchers may request access to anonymized patient level data or aggregate study data when Regeneron has received marketing authorization from major health authorities (e.g., FDA, European Medicines Agency (EMA), Pharmaceuticals and Medical Devices Agency (PMDA), etc) for the product and indication, has the legal authority to share the data, and has made the study results publicly available (eg, scientific publication, scientific conference, clinical trial registry).
All Individual Patient Data (IPD) that underlie publicly available results will be considered for sharing