Efficacy and safety analysis of intravitreal bio-similar products of bevacizumab in patients with macular edema because of retinal diseases

Purpose: The purpose of this study was to evaluate retrospectively the efficacy and safety profile of intravitreal injection of bevacizumab bio-similar product Zybev(Z) for macular edema because of retinal diseases. Methods: A retrospective analysis was conducted on patients with macular edema because of retinal diseases, who had been administered intravitreal injections of bio-similar bevacizumab at a tertiary eye care center. Changes in the retinal thickness and visual acuity were evaluated to judge the efficacy, and adverse events were noted for the safety profile over a period of 6 weeks. Results: A total of 104 patients were included in the study. The mean age of the patients was 53 +/- 13.5 years. The mean pre-injection best corrected visual acuity (BCVA) was 1.32 +/- 0.70 log minimum angle of resolution (logMAR) with a central subfield thickness (CST) of 429.26 +/- 204.30 mu m, and the post-injection BCVA at 6 weeks was 1.13 +/- 0.71 logMAR with a CST of 302.26 +/- 104.50 mu m; this change was statistically significant (P < 0.05) for all groups. The mean average cube thickness (mu m) decreased from 11.85 +/- 1.96 pre-injection to 10.52 +/- 1.75 post-injection, and the mean average cube volume (mm(3)) decreased from 329.30 +/- 54.35 to 302.23 +/- 49.56 (P < 0.05). During the follow-up period after injection, no patient had inflammation, endophthalmitis, an increase in intra-ocular pressure, or systemic side effects. Conclusion: This short-term retrospective analysis provides evidence regarding the efficacy and safety of intravitreal injection of bio-similar products of bevacizumab for the treatment of macular edema because of retinal diseases.