You are here

  • Home
  • Archive
  • Volume 5, Issue 1
  • A comparison of the 1-year surgical outcomes of ab externo trabeculotomy and microhook ab interno trabeculotomy using propensity score analysis

Article Text

Article menu

Download PDFPDF

XML
Original research
A comparison of the 1-year surgical outcomes of ab externo trabeculotomy and microhook ab interno trabeculotomy using propensity score analysis
  1. Sotaro Mori,
  2. Yusuke Murai,
  3. Kaori Ueda,
  4. Mari Sakamoto,
  5. Takuji Kurimoto,
  6. Yuko Yamada-Nakanishi,
  7. Makoto Nakamura
  1. Department of Surgery, Division of Ophthalmology, Kobe University Graduate School of Medicine, Kobe, Japan
  1. Correspondence to Dr Makoto Nakamura; manakamu{at}med.kobe-u.ac.jp

Abstract

Objective To compare the 1-year outcomes of trabeculotomy ab externo (ab externo TLO) and trabeculotomy ab interno using a microhook (ab interno TLO) for glaucoma patients using propensity score analysis.

Methods and analysis The medical charts of 65 consecutive patients who underwent ab externo TLO and those of 69 patients who underwent ab interno TLO were reviewed. Logistic regression analysis was conducted to calculate the propensity score using 1:1 matched analysis, which indicates the likelihood of surgical success at 12 months. We set the outcome-related covariates as age, glaucoma type, mean deviation, preoperative intraocular pressure (IOP), the number of preoperative glaucoma eye drops and the presence or absence of combined cataract surgery. Fifty eyes per each surgery group were subsequently compared.

Results The mean preoperative IOP was 32.5±11.2 mm Hg in the ab externo TLO group and 28.4±7.8 mm Hg in the ab interno TLO group (p=0.08). The mean postoperative IOP at 12 months was 18.3±7.4 mm Hg in the former group and 17.8±6.3 mm Hg in the latter (p=0.91). When surgical success was defined as a postoperative IOP of between 5 and 21 mm Hg with a more than 20% IOP reduction from baseline and no additional glaucoma surgery, the rate at 12 months was 78% in the ab externo TLO group and 74% in the ab interno TLO group (p=1.00).

Conclusion The 1-year success rate was not significantly different between ab externo and ab interno TLO.

  • glaucoma
  • treatment surgery
http://creativecommons.org/licenses/by-nc/4.0/

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

https://doi.org/10.1136/bmjophth-2020-000446

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.

    View Full Text

    Footnotes

    • Contributors Conceptualisation: TK, YY-N and MN; data sampling: SM, YM and KU; data analysis: SM and MS; drafting: SM and MN; critical reading and reviewing: TK, YY-N and MS; submission: MN.

    • Funding This study was partly presented at the 8th World Glaucoma Congress 2019 held in Melbourne.

    • Competing interests None declared.

    • Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.

    • Patient consent for publication Not required.

    • Ethics approval This study was approved by the Institutional Review Board of the Kobe University Graduate School of Medicine (No.1557).

    • Provenance and peer review Not commissioned; externally peer reviewed.