RESEARCH SUPPORT, NON-U.S. GOV'T
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Ranibizumab for macular edema following central retinal vein occlusion: six-month primary end point results of a phase III study.

Ophthalmology 2010 June
PURPOSE: To assess the efficacy and safety of intraocular injections of 0.3 mg or 0.5 mg ranibizumab in patients with macular edema after central retinal vein occlusion (CRVO).

DESIGN: Prospective, randomized, sham injection-controlled, double-masked, multicenter clinical trial.

PARTICIPANTS: A total of 392 patients with macular edema after CRVO.

METHODS: Eligible patients were randomized 1:1:1 to receive monthly intraocular injections of 0.3 or 0.5 mg of ranibizumab or sham injections.

MAIN OUTCOME MEASURES: The primary efficacy outcome measure was mean change from baseline best-corrected visual acuity (BCVA) letter score at month 6. Secondary outcomes included other parameters of visual function and central foveal thickness (CFT).

RESULTS: Mean (95% confidence interval [CI]) change from baseline BCVA letter score at month 6 was 12.7 (9.9-15.4) and 14.9 (12.6-17.2) in the 0.3 mg and 0.5 mg ranibizumab groups, respectively, and 0.8 (-2.0 to 3.6) in the sham group (P<0.0001 for each ranibizumab group vs. sham). The percentage of patients who gained > or =15 letters in BCVA at month 6 was 46.2% (0.3 mg) and 47.7% (0.5 mg) in the ranibizumab groups and 16.9% in the sham group (P<0.0001 for each ranibizumab group vs. sham). At month 6, significantly more ranibizumab-treated patients (0.3 mg = 43.9%; 0.5 mg = 46.9%) had BCVA of > or = 20/40 compared with sham patients (20.8%; P<0.0001 for each ranibizumab group vs. sham), and CFT had decreased by a mean of 434 microm (0.3 mg) and 452 microm (0.5 mg) in the ranibizumab groups and 168 microm in the sham group (P<0.0001 for each ranibizumab group vs. sham). The median percent reduction in excess foveal thickness at month 6 was 94.0% and 97.3% in the 0.3 mg and 0.5 mg groups, respectively, and 23.9% in the sham group. The safety profile was consistent with previous phase III ranibizumab trials, and no new safety events were identified in patients with CRVO.

CONCLUSIONS: Intraocular injections of 0.3 mg or 0.5 mg ranibizumab provided rapid improvement in 6-month visual acuity and macular edema following CRVO, with low rates of ocular and nonocular safety events.

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