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| Tracking Information | |
|---|---|
| First Received Date ICMJE | November 3, 1999 |
| Last Updated Date | March 3, 2008 |
| Start Date ICMJE | March 1994 |
| Primary Completion Date | |
| Current Primary Outcome Measures ICMJE | |
| Original Primary Outcome Measures ICMJE | |
| Change History | Complete list of historical versions of study NCT00001395 on ClinicalTrials.gov Archive Site |
| Current Secondary Outcome Measures ICMJE | |
| Original Secondary Outcome Measures ICMJE | |
| Descriptive Information | |
| Brief Title ICMJE | Long Term Follow-Up of Diabetic Retinopathy |
| Official Title ICMJE | Long Term Follow-Up of Diabetic Retinopathy |
| Brief Summary | The efficacy of laser photocoagulation treatment for diabetic retinopathy has been demonstrated by several National Eye Institute (NEI) sponsored clinical trials. The Diabetic Retinopathy Study (DRS) demonstrated that scatter photocoagulation reduces the risk of blindness from diabetic retinopathy. The Early Treatment Diabetic Retinopathy Study (ETDRS) extended these findings by providing information on when to initiate scatter photocoagulation and by demonstrating that focal treatment was effective in treating macula edema. The Krypton Argon Regression Neovascularization Study (KARNS) showed that scatter photocoagulation with krypton red laser was just as safe and effective as the argon blue-green laser in the treatment of proliferative diabetic retinopathy. Unfortunately, there is little data on the long term effects of photocoagulation on visual function. The first objective of this study is to assess the long term effects of photocoagulation for diabetic retinopathy. A second objective is to provide additional information on the risk of progression of cataracts in persons with diabetes. All patients previously treated with laser photocoagulation (focal and/or scatter) are eligible to participate in this long term study. The first priority will be given to patients who participated in the ETDRS and KARNS because of the wealth of information available regarding the details of their treatment and course after treatment. Study evaluations will include a standard ophthalmic examination, fluorescein angiography, lens and fundus photography. |
| Detailed Description | The efficacy of laser photocoagulation treatment for diabetic retinopathy has been demonstrated by several National Eye Institute (NEI) sponsored clinical trials. The Diabetic Retinopathy Study (DRS) demonstrated that scatter photocoagulation reduces the risk of blindness from diabetic retinopathy. The Early Treatment Diabetic Retinopathy Study (ETDRS) extended these findings by providing information on when to initiate scatter photocoagulation and by demonstrating that focal treatment was effective in treating macula edema. The Krypton Argon Regression Neovascularization Study (KARNS) showed that scatter photocoagulation with krypton red laser was just as safe and effective as the argon blue-green laser in the treatment of proliferative diabetic retinopathy. Unfortunately, there is little data on the long term effects of photocoagulation on visual function. The first objective of this study is to assess the long term effects of photocoagulation for diabetic retinopathy. A second objective is to provide additional information on the risk of progression of cataracts in persons with diabetes. All patients previously treated with laser photocoagulation (focal and/or scatter) are eligible to participate in this long term study. The first priority will be given to patients who participated in the ETDRS and KARNS because of the wealth of information available regarding the details of their treatment and course after treatment. Study evaluations will include a standard ophthalmic examination, fluorescein angiography, lens and fundus photography. |
| Study Phase | |
| Study Type ICMJE | Observational |
| Study Design ICMJE | |
| Condition ICMJE |
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| Intervention ICMJE | |
| Study Arms / Comparison Groups | |
| Publications * | |
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* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline. |
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| Recruitment Information | |
| Recruitment Status ICMJE | Completed |
| Enrollment ICMJE | 75 |
| Completion Date | August 2000 |
| Primary Completion Date | |
| Eligibility Criteria ICMJE | All patients with diabetic retinopathy that has been treated previously with laser photocoagulation, either focal or scatter treatment, are eligible. Patients must be 18 or more years of age. Patients who have not had laser photocoagulation for diabetic retinopathy are not eligible for the study. |
| Gender | Both |
| Ages | |
| Accepts Healthy Volunteers | No |
| Contacts ICMJE | Contact information is only displayed when the study is recruiting subjects |
| Location Countries ICMJE | United States |
| Administrative Information | |
| NCT ID ICMJE | NCT00001395 |
| Responsible Party | |
| Study ID Numbers ICMJE | 940106, 94-EI-0106 |
| Study Sponsor ICMJE | National Eye Institute (NEI) |
| Collaborators ICMJE | |
| Investigators ICMJE | |
| Information Provided By | National Institutes of Health Clinical Center (CC) |
| Verification Date | March 1999 |
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ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP |
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