Article Text

other Versions

PDF
A systematic review of as needed versus treat and extend ranibizumab or bevacizumab treatment regimens for neovascular age-related macular degeneration
  1. David Chin-Yee1,
  2. Thomas Eck1,
  3. Susan Fowler2,
  4. Angela Hardi2,
  5. Rajendra S Apte1
  1. 1Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St Louis, Missouri, USA
  2. 2Becker Medical Library, Washington University School of Medicine, St Louis, Missouri, USA
  1. Correspondence to Dr Rajendra S Apte, Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, 660 South Euclid Avenue, Box 8096, St Louis, MO 63110, USA; apte{at}vision.wustl.edu

Abstract

Purpose To evaluate the relative efficacy of as needed versus treat and extend regimen for the treatment of neovascular age-related macular degeneration (AMD).

Methods We conducted a systematic review of studies that evaluated the efficacy of as needed or treat and extend regimen for neovascular AMD by searching multiple databases up to December 2013. Included studies were selected based on study duration of no less than 12 months, availability of outcome data, treatment protocol for as needed groups or pro re nata (PRN) receiving bevacizumab or ranibizumab, and all studies with treat extend protocols following the ‘inject and extend’ regimen. The outcome data were pooled and analysed.

Results 1046 peer reviewed articles meeting our initial search criteria were returned. After further review by two independent reviewers, 8 studies meeting treat and extend protocol and 62 studies meeting PRN protocol were included. The mean improvement in visual acuity in the PRN group was 5.4 ETDRS letters compared with 10.4 ETDRS letters in the treat and extend group. The PRN group received an average of 5.60 injections at 1 year compared with 8.09 in the treat and extend group. Central retinal thickness improved on average by 100.32 µ in the PRN group compared with 87.7 µ in the treat and extend group.

Conclusions Though our study suggests superiority of the treat and extend regimen to PRN treatment in a 12-month period, this review demonstrates the need for randomised clinical trials to confirm our findings and to evaluate long-term efficacy outcomes with these regimens compared with monthly therapy.

  • Angiogenesis
  • Degeneration
  • Drugs
  • Macula
  • Treatment Medical

Statistics from Altmetric.com

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

Linked Articles

  • At a glance
    Keith Barton Jost Jonas James Chodosh