2019
DOI: 10.1038/s41598-019-38934-8
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Anti-VEGF injection frequency correlates with visual acuity outcomes in pro re nata neovascular AMD treatment

Abstract: Clinical trials report substantial gains in visual acuity (VA) for eyes treated with intravitreal anti-VEGF for neovascular AMD (nAMD). In clinical reality, VA outcomes are more variable. Here we investigate pro-re nata treatment frequencies and VA in a real-life cohort of 1382 eyes (1048 patients). Patients with nAMD and one year complete follow-up treated with pro-re nata anti-VEGF between 2009 and 2016 were included. Injection frequency and VA was analyzed clustered by year of first treatment. Baseline para… Show more

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Cited by 43 publications
(32 citation statements)
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“…All experiments were performed in accordance with relevant guidelines and regulations. The methods of clinical data acquisition have been described previously 6 , 7 and are briefly summarized here: all analyses reported in this study are per eye; VA was acquired on decimal charts and converted to ETDRS-equivalents for analysis. In contrast to controlled trials this is a real-life cohort, implying that a number of different operators collected VA as well as other measurements and that operators changed over the years.…”
Section: Methodsmentioning
confidence: 99%
“…All experiments were performed in accordance with relevant guidelines and regulations. The methods of clinical data acquisition have been described previously 6 , 7 and are briefly summarized here: all analyses reported in this study are per eye; VA was acquired on decimal charts and converted to ETDRS-equivalents for analysis. In contrast to controlled trials this is a real-life cohort, implying that a number of different operators collected VA as well as other measurements and that operators changed over the years.…”
Section: Methodsmentioning
confidence: 99%
“…There are different anti-VEGF IVI protocols in the management of nAMD, including application in regular (monthly and bi-monthly) intervals or irregular (“pro-re-nata” [PRN, as needed] and “treat-and-extend” [TAE]) intervals after three consecutive monthly loading doses [ 5 8 ]. While the regular fixed-interval protocols adopt a strategy of applying IVI regardless of whether any sign of disease activity present, in the PRN treatment protocol, the IVI decision is made according to any sign of disease activity in monthly visits [ 5 7 ]. However, TAE is an individualized, proactive dosing regimen, in which, after three consecutive loading IVI doses, in-person visits and at-the-same-day IVI treatment intervals are extended (1 week to 4 weeks, to a maximum of 12 weeks) or shortened (1 week to 4 weeks, to a minimum of 4 weeks) according to predefined disease activity criteria [ 8 , 9 ].…”
Section: Introductionmentioning
confidence: 99%
“…Although these fixed-interval regimens represent on-label standards for anti-VEGF therapy, discontinuous regimens are mostly used in clinical practice in order to reduce treatment burden. The "pro-re-nata" (PRN -"as needed") protocol is based on re-treatment on evidence of exudative disease activity [13]. Conversely, the "treat and extend" (TREX) regimen is characterized by a progressive extension of treatment and visit intervals up to 12 weeks depending on the clinical findings [14].…”
Section: Introductionmentioning
confidence: 99%