Prompt Panretinal Photocoagulation Versus Ranibizumab+Deferred Panretinal Photocoagulation for Proliferative Diabetic Retinopathy (Protocol S)

This study is ongoing, but not recruiting participants.
National Eye Institute (NEI)
Genentech, Inc.
Information provided by (Responsible Party):
Diabetic Retinopathy Clinical Research Network Identifier:
First received: December 6, 2011
Last updated: April 1, 2015
Last verified: January 2015

The primary objective of the protocol is to determine if visual acuity outcomes at 2 years in eyes with proliferative diabetic retinopathy (PDR) that receive anti-vascular endothelial growth factor (anti-VEGF) therapy with deferred panretinal photocoagulation (PRP) are non-inferior to those in eyes that receive standard prompt PRP therapy.

Secondary objectives include:

  • Comparing other visual function outcomes (including Humphrey visual field testing and study participant self-reports of visual function) in eyes receiving anti-VEGF with deferred PRP with those in eyes receiving prompt PRP.
  • Determining percent of eyes not requiring PRP when anti-VEGF is given in the absence of prompt PRP.
  • Comparing safety outcomes between treatment groups.
  • Comparing associated treatment and follow-up exam costs between treatment groups.

Condition Intervention Phase
Proliferative Diabetic Retinopathy
Other: Prompt Panretinal Photocoagulation
Drug: 0.5-mg Ranibizumab
Other: Deferred panretinal photocoagulation
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Prompt Panretinal Photocoagulation Versus Intravitreal Ranibizumab With Deferred Panretinal Photocoagulation for Proliferative Diabetic Retinopathy

Resource links provided by NLM:

Further study details as provided by Diabetic Retinopathy Clinical Research Network:

Primary Outcome Measures:
  • Mean change in visual acuity from baseline to 2 years [ Time Frame: 2 years ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Mean visual acuity [ Time Frame: 2-years ] [ Designated as safety issue: No ]
  • Proportion of eyes with 10 and 15 letter vision loss or gain [ Time Frame: 2-years ] [ Designated as safety issue: No ]
  • Humphrey visual field (HVF) testing, at sites with HVF capabilities NEI VFQ-25, and UAB-LLQ [ Time Frame: 2-years ] [ Designated as safety issue: No ]
    VFQ-25=Visual Function Questionnaire-25, UAB-JJQ=University of Alabama at Birmingham Low Luminance Questionnaire,

  • Need for Vitrectomy [ Time Frame: 2-years ] [ Designated as safety issue: Yes ]
  • Mean change in OCT central subfield thickness from baseline [ Time Frame: 2-years ] [ Designated as safety issue: No ]
  • Proportion of eyes with progression to central subfield involved diabetic macular edema [ Time Frame: 2-years ] [ Designated as safety issue: No ]
    In eyes without central subfield involved diabetic macular edema only.

  • Percent of eyes with vitreous hemorrhage [ Time Frame: 2-years ] [ Designated as safety issue: Yes ]
  • Proportion of eyes with complete regression of neovascularization on fundus photography from baseline to 2-years [ Time Frame: baseline to 2-years ] [ Designated as safety issue: No ]
  • Treatment and Follow-up costs [ Time Frame: 2-years ] [ Designated as safety issue: No ]

Estimated Enrollment: 316
Study Start Date: March 2012
Estimated Study Completion Date: December 2017
Primary Completion Date: January 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Anti-VEGF+Deferred PRP
Anti-VEGF= Anti vascular endothelial growth factor. PRP= Panretinal photocoagulation. Intravitreal anti-VEGF with PRP only if indicated.
Drug: 0.5-mg Ranibizumab
Intravitreal injection of 0.5 mg ranibizumab (Lucentis™) at baseline and up to every 4 weeks using defined retreatment criteria.
Other: Deferred panretinal photocoagulation
PRP is deferred until failure/futility criteria for intravitreal injection are met.
Active Comparator: Prompt PRP
PRP= Panretinal Photocoagulation. PRP alone.
Other: Prompt Panretinal Photocoagulation
Panretinal photocoagulation alone at baseline (full session completed within 56 days).


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Age >= 18 years -Individuals < 18 years old are not being included because PDR is so rare in this age group that the diagnosis of PDR may be questionable.

Diagnosis of diabetes mellitus (type 1 or type 2)

Any one of the following will be considered to be sufficient evidence that diabetes is present:

  • Current regular use of insulin for the treatment of diabetes
  • Current regular use of oral anti-hyperglycemia agents for the treatment of diabetes
  • Documented diabetes by ADA and/or WHO criteria (see Procedures Manual for definitions) Able and willing to provide informed consent.

Meets at least all of the following ocular criteria criteria:

  • Presence of PDR which the investigator intends to manage with PRP alone but for which PRP can be deferred for at least 4 weeks in the setting of intravitreal ranibizumab, in the investigator's judgment.
  • Best corrected Electronic-Early Treatment Diabetic Retinopathy Study (E-ETDRS) visual acuity letter score > 24 (approximate Snellen equivalent 20/320) on the day of randomization.
  • Media clarity, pupillary dilation, and study participant cooperation sufficient to administer PRP and obtain adequate fundus photographs and OCT.

    • Investigator must verify accuracy of OCT scan by ensuring it is centered and of adequate quality

Exclusion Criteria:

Significant renal disease, defined as a history of chronic renal failure requiring dialysis or kidney transplant.

A condition that, in the opinion of the investigator, would preclude participation in the study (e.g., unstable medical status including blood pressure, cardiovascular disease, and glycemic control).

  • Individuals in poor glycemic control who, within the last 4 months, initiated intensive insulin treatment (a pump or multiple daily injections) or plan to do so in the next 4 months should not be enrolled.

Participation in an investigational trial within 30 days of randomization that involved treatment with any drug that has not received regulatory approval for the indication being studied.

  • Study participants cannot receive another investigational drug while participating in the study.

Known allergy to any component of the study drug.

Blood pressure > 180/110 (systolic above 180 or diastolic above 110).

  • If blood pressure is brought below 180/110 by anti-hypertensive treatment, individual can become eligible.

Myocardial infarction, other acute cardiac event requiring hospitalization, stroke, transient ischemic attack, or treatment for acute congestive heart failure within 4 months prior to randomization.

Systemic anti-VEGF or pro-VEGF treatment within 4 months prior to randomization.

  • These drugs should not be used during the study.

For women of child-bearing potential: pregnant or lactating or intending to become pregnant within the next 3 years.

  • Women who are potential study participants should be questioned about the potential for pregnancy. Investigator judgment is used to determine when a pregnancy test is needed.

Individual is expecting to move out of the area of the clinical center to an area not covered by another certified clinical center during the 3 years of the study.

Individual has any of the following ocular characteristics:

  • History of prior panretinal photocoagulation (prior PRP is defined as ≥ 100 burns outside of the posterior pole)
  • Tractional retinal detachment involving the macula.

    -- A tractional retinal detachment is not an exclusion if it is outside of the posterior pole (not threatening the macula) and in the investigator's judgment, is not a contraindication to intravitreal ranibizumab treatment and also does not preclude deferring PRP for at least 4 weeks in the setting of intravitreal ranibizumab

  • Exam evidence of neovascularization of the angle (neovascularization of the iris alone is not an exclusion if it does not preclude deferring PRP for at least 4 weeks in the investigator's judgment).
  • If macular edema is present, it is considered to be primarily due to a cause other than diabetic macular edema.

    -- An eye should not be considered eligible if:

    • macular edema is present that is considered to be related to ocular surgery such as cataract extraction or
    • clinical exam and/or OCT suggest that vitreoretinal interface abnormalities disease (e.g., a taut posterior hyaloid or epiretinal membrane) is the primary cause of any macular edema.
  • An ocular condition is present (other than diabetic retinopathy) that, in the opinion of the investigator, might alter visual acuity during the course of the study (e.g., retinal vein or artery occlusion, uveitis or other ocular inflammatory disease, neovascular glaucoma, etc.).

    -- A vitreous or preretinal hemorrhage is not an exclusion if it is out of the visual axis and in the investigator's judgment is not having any affect on visual acuity.

  • Substantial cataract that, in the opinion of the investigator, is likely to be decreasing visual acuity by 3 lines or more (i.e., cataract would be reducing acuity to 20/40 or worse if eye were otherwise normal).
  • History of intravitreal anti-VEGF treatment at any time in the past 2 months.
  • History of corticosteroid treatment (intravitreal or peribulbar) at any time in the past 4 months.

    --If the investigator believes that there may still be a substantial effect 4 months after prior treatment (e.g., dose of intravitreal triamcinolone higher than 4 mg), the eye should not be included.

  • History of major ocular surgery (including vitrectomy, cataract extraction, scleral buckle, any intraocular surgery, etc.) within prior 4 months or anticipated within the next 6 months following randomization.
  • History of YAG capsulotomy performed within 2 months prior to randomization.
  • Aphakia.
  • Uncontrolled glaucoma (in investigator's judgment).
  • Exam evidence of severe external ocular infection, including conjunctivitis, chalazion, or substantial blepharitis
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Please refer to this study by its identifier: NCT01489189

  Show 48 Study Locations
Sponsors and Collaborators
Diabetic Retinopathy Clinical Research Network
National Eye Institute (NEI)
Genentech, Inc.
Study Chair: Jeffrey G Gross, MD Carolina Retina Center
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Diabetic Retinopathy Clinical Research Network Identifier: NCT01489189     History of Changes
Other Study ID Numbers: Protocol S 
Study First Received: December 6, 2011
Last Updated: April 1, 2015
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Diabetic Retinopathy
Retinal Diseases
Cardiovascular Diseases
Diabetes Complications
Diabetes Mellitus
Diabetic Angiopathies
Endocrine System Diseases
Eye Diseases
Vascular Diseases
Angiogenesis Inhibitors
Angiogenesis Modulating Agents
Antineoplastic Agents
Growth Inhibitors
Growth Substances
Immunologic Factors
Physiological Effects of Drugs processed this record on May 26, 2016