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Impact of injection frequency on 5-year real-world visual acuity outcomes of aflibercept therapy for neovascular age-related macular degeneration. | LitMetric
Background : To evaluate the impact of injection frequency on yearly visual outcomes of patients treated with intravitreal aflibercept for neovascular age-related macular degeneration (nAMD) over a period of 5 years in a tertiary ophthalmic centre.Design : Single centre, retrospective cohort study.Participants : Consecutive treatment-naive nAMD patients initiated on aflibercept injections 5 years ago.Methods : The Moorfields OpenEyes database was searched for consecutive patients who were initiated on intravitreal aflibercept for nAMD in 2013-14 and the visual acuity (VA) in Early Diabetic Retinopathy Study (ETDRS) letters and injection records per year were recorded for a period of 5 years. Analyses of the whole cohort and a sub-sample of 5-year completers were done. The cohort was further grouped into Group A (on continuous treatment), Group B (early cessation of treatment) and Group C (interrupted treatment) to evaluate the relation between treatment frequency and visual outcomes.Main Outcome Measures : The primary end point was change in VA at 5 years; secondary outcomes included proportion of eyes that gained or maintained VA, number of injections received and the effect of treatment frequency.Results : Data were collected on 468 patients (512 eyes). Sixty-six percent of the patients completed 5-year follow-up. The mean age of the whole cohort was 79.5 ± 8.5 years and the mean baseline VA was 58.3 ± 15.4 letters. Amongst the completers, final VA change was -2.9 (SD 23.4) ETDRS letters and the cumulative number of injections over 5 years was 24.2 (10.6). Group A had three letter gain and received significantly higher cumulative number of injections over 5 years than Group B and C (31.8, 14.6 and 18.4 respectively, p = 0.001). After adjusting for age and baseline VA, on average, final VA was +8.0 letters higher in the ≥20 injections group than the <20 group (p = 0.001).Conclusions : Aflibercept therapy results in sustained good visual outcome over 5 years in neovascular AMD eyes when early and persistent treatment is given.
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