Trial reportInternational ophthalmology2022
The effect of vitamin D supplementation on the outcome of treatment with bevacizumab in diabetic macular edema: a randomized clinical trial.
Trial report in International ophthalmology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
12 citing papers in PubMed, 13 citations in OpenAlex.
- Review
- Vitamin D supplementation in diabetic retinopathy: an optical coherence tomography angiography study of changes in macular perfusion.International journal of retina and vitreous · 2026Article
- Association Among Serum Vitamin D Levels, Visual Field Alterations, and Optical Coherence Tomography Parameters: A Clinical Correlation Study.Life (Basel, Switzerland) · 2026Article
- Association Between Serum Vitamin D3 Levels and Diabetic Macular Edema in Patients with Type 2 Diabetes: A Retrospective Case-Control Study.Diabetes, metabolic syndrome and obesity : targets and therapy · 2026Article
- Bevacizumab and beyond: investigating the role of combination therapies in the management of retinal diseases.International ophthalmology · 2025Review
- Synergistic Association of Glycemic Variability and Severe Vitamin D Deficiency with Proliferative Diabetic Retinopathy.Nutrients · 2025Article
- The Role of Diet and Oral Supplementation for the Management of Diabetic Retinopathy and Diabetic Macular Edema: A Narrative Review.BioMed research international · 2025Review
- Vitamin D Deficiency as a Risk Factor for Diabetic Retinopathy: A Systematic Review and Meta-Analysis.Biomedicines · 2024Review
- Diabetic macular edema (DME): dissecting pathogenesis, prognostication, diagnostic modalities along with current and futuristic therapeutic insights.International journal of retina and vitreous · 2024Review
- The Role of Vitamin D3 in Ocular Diseases.Nutrients · 2024Review
- Effects of vitamin family members on insulin resistance and diabetes complications.World journal of diabetes · 2024Article
- Vitamin D and Diabetic Retinopathy.International journal of molecular sciences · 2023Review
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeConcomitant vitamin D deficiency (VDD) is speculated to aggravate diabetic macular edema (DME). We aimed to determine the effect of hypovitaminosis D correction on the outcome of treatment with intravitreal bevacizumab (IVB) in DME eyes.
methodsIn this randomized clinical trial, 83 eyes of 83 patients with DME were recruited and divided into three groups: normal vitamin D levels + IVB administration (Group 1), vitamin D insufficient/deficient + IVB administration (Group 2), and vitamin D insufficient/deficient + IVB administration + oral vitamin D supplementation (Group 3). Participants were followed for 6 months after the intervention. Visual (corrected distance visual acuity, CDVA) and anatomical (central macular thickness, CMT) outcomes of intervention were evaluated 1, 3, and 6 months after three monthly loading doses of IVB were given. Serum vitamin D levels were measured 1 and 6 months after the third IVB administration.
resultsA total of 29, 26, and 28 eyes were enrolled in groups 1, 2, and 3, respectively. In months 1, 3, and 6, after the three basic loading doses of IVB, visual acuity and CMT improved in all three groups, but improvements (both functional and anatomical) in groups 1 and 3 in month 6 were more significant than in group 2 (mean CDVA LogMAR changes: - 0.18 ± 0.03, - 0.14 ± 0.05, and - 0.2 ± 0.06; mean CMT reductions: - 82.24 ± 11.43, - 66.62 ± 14.34, and - 86.14 ± 18.36, in groups 1, 2, and 3, respectively; p < 0.001). The mean number of IVB injections during follow-up was 5.33 (range 4-7), which did not differ between the groups.
conclusionCorrection of vitamin D deficiency in DME patients with type 2 diabetes and vitamin D deficiency, in addition to IVB injections, may play a role in improving CDVA and CMT. However, this beneficial effect seems to be delayed by several months.
trial registrationIranian Registry of Clinical Trials (IRCT), IRCT20200407046978N1, registered on April 11, 2020, retrospectively registered ( https://en.irct.ir/trial/46999 ).
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.