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COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY

Intravitreal bevacizumab plus grid laser photocoagulation or intravitreal bevacizumab or grid laser photocoagulation for diffuse diabetic macular edema: results of the Pan-american Collaborative Retina Study Group at 24 months

J Fernando Arevalo, Andres F Lasave, Lihteh Wu, Manuel Diaz-Llopis, Roberto Gallego-Pinazo, Arturo A Alezzandrini, Maria H Berrocal
Retina 2013, 33 (2): 403-13
23222389

PURPOSE: To evaluate the anatomical and functional outcomes at 24 months in patients with diffuse diabetic macular edema treated with primary intravitreal bevacizumab (IVB) plus grid laser photocoagulation (GLP) or primary IVB alone or GLP alone.

METHODS: Retrospective, interventional, comparative, multicenter study. We included in this analysis 141 eyes of 120 patients with diffuse diabetic macular edema treated with primary IVB alone (Group A), 120 eyes of 94 patients with GLP therapy (Group B), and 157 eyes of 104 patients treated with IVB plus GLP (Group C).

RESULTS: In all 3 groups, the authors observed improvement of Early Treatment Diabetic Retinopathy Study best-corrected visual acuity from baseline to 24-month follow-up (P < 0.0001). The improvement rate in Group A was statistically significantly better than in Group B (analysis of variance, P = 0.013). The authors also found a decrease in central macular thickness in all groups from baseline to the 24-month follow-up (P < 0.0001). The comparison among 3 groups showed higher central macular thickness decrease in Group A than in Groups B and C (analysis of variance, P < 0.001).

CONCLUSION: The study provides evidence to support the use of primary IVB with or without GLP as treatment of diffuse diabetic macular edema. Primary IVB without GLP seems to be superior to GLP alone to provide stability or improvement in best-corrected visual acuity in patients with diffuse diabetic macular edema at 24 months.

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