Trial reportOphthalmology2011
The Ahmed Baerveldt Comparison Study methodology, baseline patient characteristics, and intraoperative complications.
Trial report in Ophthalmology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT00376363 (Ahmed Versus Baerveldt Comparison Study), which is not on this map. Cited by 48 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Ahmed Versus Baerveldt Comparison Study
Who cites it
48 citing papers in PubMed, 3 syntheses or guidelines pooled it, 129 citations in OpenAlex.
- Paul tube implant: a meta-analysis and systematic review evaluating clinical outcomes.Eye (London, England) · 2026Pooled it
- Aqueous shunts for glaucoma.The Cochrane database of systematic reviews · 2017Pooled it
- The Ahmed shunt versus the Baerveldt shunt for refractory glaucoma: a meta-analysis.BMC ophthalmology · 2016Pooled it
- Risk Factors for Failure of Tube Shunt Surgery: A Pooled Data Analysis.American journal of ophthalmology · 2022Trial
- Postoperative Complications in the Ahmed Baerveldt Comparison Study During Five Years of Follow-up.American journal of ophthalmology · 2016Trial
- Five-year treatment outcomes in the Ahmed Baerveldt comparison study.Ophthalmology · 2015Trial
- Three-year treatment outcomes in the Ahmed Baerveldt comparison study.Ophthalmology · 2014Trial
- [Clinical results of encapsulated bleb removal after Ahmed glaucoma valve implants].Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft · 2013Trial
- Treatment outcomes in the Ahmed Baerveldt Comparison Study after 1 year of follow-up.Ophthalmology · 2011Trial
- The Association of an Electronic Frailty Index with Glaucoma Shunt Outcomes.Geriatrics (Basel, Switzerland) · 2026Article
- In vitro flow properties of Preserflo Michroshunt with an intraluminal stent.Eye (London, England) · 2025Article
- Early Postoperative Conjunctival Complications Leading to Exposure of Surgically Implanted CorNeat EverPatch Devices.Ophthalmology · 2025Article
- Surgical outcomes including visual improvement after glaucoma surgery in patients with neovascular glaucoma.Heliyon · 2024Article
- Effect of a Pericardium Graft Inserted Adjacent to the Endplate in the Ahmed Glaucoma Valve Implantation.Journal of clinical medicine · 2023Article
- Disparities in Glaucoma Surgery: A Review of Current Evidence and Future Directions for Improvement.Translational vision science & technology · 2023Review
- Outcomes of Sutureless Ahmed Glaucoma Valve Surgery: A Retrospective Study.Ophthalmology and therapy · 2022Article
- Factors associated with vision loss in Black or Hispanic patients 1 year after standalone or combined Ahmed glaucoma valve surgery.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2022Article
- Posterior segment complications of Ahmed valve implantation.BMC ophthalmology · 2022Article
- Efficacy and Safety of Temporary in situ Stenting of Ahmed Glaucoma Valve in Eyes with High Risk of Hypotony.Clinical ophthalmology (Auckland, N.Z.) · 2022Article
- The influence of etiology on surgical outcomes in neovascular glaucoma.BMC ophthalmology · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
Abstract
purposeThe Ahmed Baerveldt Comparison (ABC) Study compares the long-term outcomes and complications of the Ahmed glaucoma valve (AGV; model FP7; New World Medical, Los Ranchos, CA) and the Baerveldt glaucoma implant (BGI; model 101-350; Abbott Medical Optics, Abbott Park, IL).
designMulticenter, randomized, controlled clinical trial.
participantsTwo hundred seventy-six glaucoma patients at 16 clinical centers worldwide who were 18 to 85 years of age with inadequately controlled intraocular pressure (IOP; ≥18 mmHg) in whom placement of an aqueous shunt was planned.
methodsStudy patients were randomized to undergo implantation of an AGV or a BGI.
main outcome measuresFailure, defined as IOP >21 mmHg or not reduced by 20% less than baseline or IOP ≤5 mmHg (2 consecutive visits after 3 months), additional glaucoma surgery, removal of the implant, or loss of light perception vision.
resultsA total of 276 patients were enrolled between October 2006 and April 2008, including 143 in the AGV group and 133 in the BGI group. The mean age±standard deviation (SD) of patients enrolled was 63±14 years, and 52% were male. The mean baseline IOP±SD was 31.5±11.8 mmHg. Except for a 13% higher prevalence of hypertension in the AGV group, no significant differences in baseline demographic or ocular characteristics were observed between the study groups. Intraoperative complications occurred in 11 (8%) patients in the AGV group and in 16 (12%) patients in the BGI group (P = 0.31).
conclusionsThe ABC Study should yield valuable prospective data comparing 2 commonly used aqueous shunts in clinical practice.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.