Link to the University of Pittsburgh Homepage
Link to the University Library System Homepage Link to the Contact Us Form

Similar Performance of Trabectome and Ahmed Glaucoma Devices in a Propensity Score-matched Comparison

Esfandiari, H and Shazly, TA and Waxman, SA and Kola, S and Kaplowitz, KB and Brown, EN and Loewen, NA (2018) Similar Performance of Trabectome and Ahmed Glaucoma Devices in a Propensity Score-matched Comparison. Journal of Glaucoma, 27 (6). 490 - 495. ISSN 1057-0829

Submitted Version
Available under License : See the attached license file.

Download (445kB) | Preview
[img] Plain Text (licence)
Available under License : See the attached license file.

Download (1kB)


Purpose: To apply propensity score matching to Ahmed glaucoma drainage implants (AGI) to trabectome-mediated ab interno trabeculectomy (AIT). Recent data suggest that AIT can produce results similar to AGI traditionally reserved for more severe glaucoma. Methods: AGI and AIT patients with at least 1 year of follow-up were included. The primary outcome measures were intraocular pressure (IOP), glaucoma medications, and a Glaucoma Index (GI) score. GI reflected glaucoma severity based on visual field, the number of preoperative medications, and preoperative IOP. Score matching used a genetic algorithm consisting of age, sex, type of glaucoma, concurrent phacoemulsification, baseline number of medications, and baseline IOP. Patients without a close match were excluded. Results: Of 152 patients, 34 AIT patients were matched to 32 AGI patients. Baseline characteristics including ethnicity, IOP, the number of medications, glaucoma type, the degree of visual field loss and GI were not significantly different between AIT and AGI. AIT had a preoperative IOP of 23.6±8.1 mm Hg compared with 26.5+10.6 mm Hg for AGI. At 12 months, the mean IOP was 15.0±9 mm Hg for AIT versus 15.0±4 mm Hg for AGI (P=0.8), whereas the number of drops was 2.3±2.2 for AIT versus 3.6±1.3 for AGI (P=0.016). Only 6 AIT patients (17.6%) required further surgery within the first 12 months versus 9 (28%) for AGI. Success, defined as IOP<21 mm Hg, <20% reduction and no reoperation, was achieved in 76% of AIT versus 69% of AGI (P=0.48). Complications occurred in 13% of AGI and 0.8% of AIT. Conclusions: A propensity score-matched comparison of AIT and AGI showed an equivalent IOP reduction through 1 year. Surprisingly, the AGI group required more glaucoma medications than the AIT group at 6 and 12 months.


Social Networking:
Share |


Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Esfandiari, H
Shazly, TATAS247@pitt.eduTAS2470000-0002-4561-1871
Waxman, SA
Kola, S
Kaplowitz, KB
Brown, EN
Loewen, NANAL58@pitt.eduNAL58
Date: 1 January 2018
Date Type: Publication
Journal or Publication Title: Journal of Glaucoma
Volume: 27
Number: 6
Page Range: 490 - 495
DOI or Unique Handle: 10.1097/ijg.0000000000000960
Schools and Programs: School of Medicine > Ophthalmology
Refereed: No
ISSN: 1057-0829
MeSH Headings: Glaucoma; glaucoma surgery; MIGS; microincisional glaucoma surgery; glaucoma drainage implants; Ahmed glaucoma implant
Date Deposited: 16 Mar 2017 14:34
Last Modified: 31 Mar 2021 11:55


Monthly Views for the past 3 years

Plum Analytics

Actions (login required)

View Item View Item