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Characterization of 2-year progression of different phenotypes of nonproliferative diabetic retinopathy

2023Journal article Open access
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dc.contributor.authorRibeiro, Luísa
dc.contributor.authorMarques, Inês P.
dc.contributor.authorSantos, Torcato
dc.contributor.authorCarvalho, Sara
dc.contributor.authorSantos, Ana Rita
dc.contributor.authorMendes, Luís
dc.contributor.authorLobo, Conceição
dc.contributor.authorCunha-Vaz, José
dc.date.accessioned2023-01-31T15:33:24Z
dc.date.available2023-01-31T15:33:24Z
dc.date.issued2023
dc.description.abstractThe aim of the study was to characterize the 2-year progression of risk phenotypes of nonproliferative diabetic retinopathy (NPDR) in type 2 diabetes (T2D) phenotype C, or ischemic phenotype, identified by decreased skeletonized retinal vessel density (VD), ≥2 SD over normal values, and phenotype B, or edema phenotype, identified by increased retinal thickness, i.e., subclinical macular edema, and no significant decrease in VD. A prospective longitudinal cohort study (CORDIS, NCT03696810) was conducted with 4 visits (baseline, 6 months, 1 year, and 2 years). Ophthalmological examinations included best-corrected visual acuity, color fundus photography (CFP), and optical coherence tomography (OCT) and OCT angiography. Early Treatment Diabetic Retinopathy Study grading was performed at the baseline and last visits based on 7-field CFP. Results: One hundred and twenty-two eyes from T2D individuals with NPDR fitted in the categories of phenotypes B and C and completed the 2-year follow-up. Sixty-five (53%) of the eyes were classified as phenotype B and 57 (47%) eyes as phenotype C. Neurodegeneration represented by thinning of the ganglion cell layer and inner plexiform layer was present in both phenotypes and showed significant progression over the 2-year period (p < 0.001). In phenotype C, significant progression in the 2-year period was identified in decreased skeletonized VD (p = 0.01), whereas in phenotype B microvascular changes involved preferentially decrease in perfusion density (PD, p = 0.012). Phenotype B with changes in VD and PD (flow) and preferential involvement of the deep capillary plexus (p < 0.001) is associated with development of center-involved macular edema. In the 2-year period of follow-up, both phenotypes B and C showed progression in retinal neurodegeneration, with changes at the microvascular level characterized by decreases in PD in phenotype B and decreases in VD in phenotype C.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRibeiro, L., Marques, I. P., Santos, T., Carvalho, S., Santos, A. R., Mendes, L., Lobo, C., & Cunha-Vaz, J. (2023). Characterization of 2-Year Progression of Different Phenotypes of Nonproliferative Diabetic Retinopathy. Ophthalmic Research, 228–237. https://doi.org/10.1159/000526370pt_PT
dc.identifier.doi10.1159/000526370pt_PT
dc.identifier.eissn1423-0259
dc.identifier.issn0030-3747 
dc.identifier.urihttp://hdl.handle.net/10400.22/22038
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherKargerpt_PT
dc.relation.publisherversionhttps://www.karger.com/Article/FullText/526370pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectRetinapt_PT
dc.subjectDiabetic retinopathypt_PT
dc.subjectDiabetic macular edemapt_PT
dc.subjectNeurodegenerationpt_PT
dc.subjectRetinal ischemiapt_PT
dc.titleCharacterization of 2-year progression of different phenotypes of nonproliferative diabetic retinopathypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage237pt_PT
oaire.citation.startPage228pt_PT
oaire.citation.titleOphtalmic Researchpt_PT
oaire.citation.volume66 (1)pt_PT
person.familyNameSantos
person.givenNameAna Rita
person.identifier.ciencia-id0911-4138-0C3A
person.identifier.orcid0000-0003-0139-0285
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd71931b8-d869-4334-993c-ba14ad713f01
relation.isAuthorOfPublication.latestForDiscoveryd71931b8-d869-4334-993c-ba14ad713f01

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