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Treatment patterns and visual outcomes during the maintenance phase of treat-and-extend therapy for age-related macular degeneration


Essex, Rohan W; Nguyen, Vuong; Walton, Richard; Arnold, Jennifer J; McAllister, Ian L; Guymer, Robyn H; Morlet, Nigel; Young, Stephanie; Barthelmes, Daniel; Gillies, Mark C; Fight Retinal Blindness Study Group (2016). Treatment patterns and visual outcomes during the maintenance phase of treat-and-extend therapy for age-related macular degeneration. Ophthalmology, 123(11):2393-2400.

Abstract

PURPOSE: To present the treatment patterns, disease activity, and visual outcomes of eyes in the maintenance phase of a treat-and-extend regimen for neovascular age-related macular degeneration (nAMD). To compare the maintenance phase behavior of eyes with a shorter induction phase (≤3 injections) with those requiring a longer induction phase (>3 injections).
DESIGN: Database observational study.
PARTICIPANTS: Eyes with nAMD receiving anti-vascular endothelial growth factor (VEGF) treatment using a treat-and-extend protocol. Persistently active eyes were excluded, as were eyes with <12 months follow-up during the maintenance phase.
METHODS: Clinical information from a large prospective international voluntary registry of nAMD was analyzed. The maintenance phase was defined as starting at the first clinician-reported grading of lesion inactivity.
MAIN OUTCOME MEASURES: For analyses by eye: treatment interval at first reactivation; time to first reactivation; and visual acuity change during the study period. For analyses by visit: choroidal neovascular membrane activity graded by the treating physician; time since previous injection; and visual acuity loss since previous injection (>0 letters and ≥15 letters).
RESULTS: The mean change in visual acuity during the maintenance phase was +1.0 letters at 12 months -0.6 letters at 24 months and -1.5 at 36 months. Median treatment interval increased from 35 days at study entry to 63 days at 12 months and was 60 days at 36 months. 38.5% of eyes remained inactive at all observed visits during the maintenance phase (minimum 1 year follow-up, mean 945 days). The most common treatment interval at first reactivation was 8 weeks. Treatment intervals beyond 12 weeks seemed to be associated with increased risk of disease reactivation, with risk of reactivation reaching 37.4% at treatment intervals of ≥20 weeks. Eyes with a longer induction phase had worse visual outcomes in the maintenance phase, and earlier and more-frequent disease reactivation, although they received injections less frequently.
CONCLUSIONS: The detailed behavior of eyes in the maintenance phase of treat-and-extend management for nAMD is presented. Visual acuity was well maintained during the study period. The most common interval at which reactivation first occurred was 8 weeks. Longer duration of induction phase was associated with worse visual acuity outcomes and earlier disease reactivation, perhaps because of undertreatment.

Abstract

PURPOSE: To present the treatment patterns, disease activity, and visual outcomes of eyes in the maintenance phase of a treat-and-extend regimen for neovascular age-related macular degeneration (nAMD). To compare the maintenance phase behavior of eyes with a shorter induction phase (≤3 injections) with those requiring a longer induction phase (>3 injections).
DESIGN: Database observational study.
PARTICIPANTS: Eyes with nAMD receiving anti-vascular endothelial growth factor (VEGF) treatment using a treat-and-extend protocol. Persistently active eyes were excluded, as were eyes with <12 months follow-up during the maintenance phase.
METHODS: Clinical information from a large prospective international voluntary registry of nAMD was analyzed. The maintenance phase was defined as starting at the first clinician-reported grading of lesion inactivity.
MAIN OUTCOME MEASURES: For analyses by eye: treatment interval at first reactivation; time to first reactivation; and visual acuity change during the study period. For analyses by visit: choroidal neovascular membrane activity graded by the treating physician; time since previous injection; and visual acuity loss since previous injection (>0 letters and ≥15 letters).
RESULTS: The mean change in visual acuity during the maintenance phase was +1.0 letters at 12 months -0.6 letters at 24 months and -1.5 at 36 months. Median treatment interval increased from 35 days at study entry to 63 days at 12 months and was 60 days at 36 months. 38.5% of eyes remained inactive at all observed visits during the maintenance phase (minimum 1 year follow-up, mean 945 days). The most common treatment interval at first reactivation was 8 weeks. Treatment intervals beyond 12 weeks seemed to be associated with increased risk of disease reactivation, with risk of reactivation reaching 37.4% at treatment intervals of ≥20 weeks. Eyes with a longer induction phase had worse visual outcomes in the maintenance phase, and earlier and more-frequent disease reactivation, although they received injections less frequently.
CONCLUSIONS: The detailed behavior of eyes in the maintenance phase of treat-and-extend management for nAMD is presented. Visual acuity was well maintained during the study period. The most common interval at which reactivation first occurred was 8 weeks. Longer duration of induction phase was associated with worse visual acuity outcomes and earlier disease reactivation, perhaps because of undertreatment.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Ophthalmology Clinic
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:November 2016
Deposited On:29 Nov 2016 13:07
Last Modified:29 Nov 2016 13:20
Publisher:Elsevier
ISSN:0161-6420
Publisher DOI:https://doi.org/10.1016/j.ophtha.2016.07.012
PubMed ID:27554034

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