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  • Title: Efficacy of 1.25 MG versus 2.5 MG intravitreal bevacizumab for diabetic macular edema: six-month results of a randomized controlled trial.
    Author: Lam DS, Lai TY, Lee VY, Chan CK, Liu DT, Mohamed S, Li CL.
    Journal: Retina; 2009 Mar; 29(3):292-9. PubMed ID: 19287286.
    Abstract:
    PURPOSE: To evaluate the efficacy of intravitreal injections of two different dosages of bevacizumab (Avastin) for treating diffuse diabetic macular edema. METHODS: Fifty-two eyes of 52 patients with diabetic macular edema were randomized to receive three monthly intravitreal injections of 1.25 mg or 2.5 mg bevacizumab. Patients were observed for 6 months and optical coherence tomography central foveal thickness, logMAR best-corrected visual acuity (BCVA), and adverse events were assessed. RESULTS: Forty-eight eyes of 48 patients completed the 6-month follow-up and were analyzed. Significant mean central foveal thickness reductions were observed in both groups at all follow-up visits (P < 0.013). Significant improvements between baseline and 6-month mean logMAR BCVAs were seen, with the mean logMAR BCVA improved from 0.63 to 0.52 in the 1.25 mg group and 0.60 to 0.47 in the 2.5 mg group. No significant difference in BCVA was observed between the two groups at any time point (P > 0.56). Subgroup analysis showed that intravitreal bevacizumab seemed to be more effective in eyes without any previous diabetic macular edema treatment. CONCLUSIONS: Three monthly intravitreal bevacizumab injections resulted in significant reduction in central foveal thickness and improvements in BCVA in diabetic macular edema patients. Both 1.25 mg and 2.5 mg seemed to have similar treatment efficacy.
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