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Ocular Biometric Risk Factors for Progression of Primary Angle Closure Disease: The Zhongshan Angle Closure Prevention Trial

Xu, BY; Friedman, DS; Foster, PJ; Jiang, Y; Porporato, N; Pardeshi, AA; Jiang, Y; ... He, M; + view all (2022) Ocular Biometric Risk Factors for Progression of Primary Angle Closure Disease: The Zhongshan Angle Closure Prevention Trial. Ophthalmology , 129 (3) pp. 267-275. 10.1016/j.ophtha.2021.10.003. Green open access

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Abstract

PURPOSE: To assess baseline ocular biometric risk factors for progression from primary angle closure suspect (PACS) to primary angle closure (PAC) or acute angle closure (AAC). DESIGN: Prospective observational study. PARTICIPANTS: 643 mainland Chinese aged 50 to 70 years with untreated PACS. METHODS: Participants received baseline clinical examinations including gonioscopy, anterior segment OCT (AS-OCT) imaging (Visante OCT, Carl Zeiss Meditec, Dublin, CA), and A-scan ultrasound biometry as part of the Zhongshan Angle Closure Prevention (ZAP) Trial. PACS was defined as inability to visualize pigmented trabecular meshwork in two or more quadrants based on static gonioscopy. PAC was defined as development of elevated intraocular pressure (IOP) > 24 mmHg or peripheral anterior synechiae (PAS). Progression was defined as development of PAC or an acute angle closure (AAC) attack. Multivariable logistic regression models were developed to assess biometric risk factors for progression. MAIN OUTCOME MEASURES: Progression from PACS to PAC or AAC over 6 years. RESULTS: 643 untreated eyes (609 non-progressors, 34 progressors) of 643 ZAP participants were included in the primary analysis. In a multivariable model with continuous parameters, narrower horizontal angle opening distance 500 μm from the scleral spur (AOD500; OR=1.10 per 0.01 mm decrease, p=0.03), flatter horizontal iris curvature (IC; OR=1.96 per 0.1 mm decrease, p=0.01), and older age (OR=1.11 per year increase, p=0.01) at baseline were significantly associated with progression (AUC=0.73). Smaller cumulative gonioscopy score was not associated with progression (OR=1.03 per 1 modified Shaffer grade decrease; p=0.85) when replacing horizontal AOD500 in the multivariable model. In a separate multivariable model with categorical parameters, participants in the lowest quartile of horizontal AOD500 (OR=3.10, p=0.002) and IC (OR=2.48, p=0.014) measurements and aged 59 years and older (OR=2.68, p=0.01) at baseline had higher odds of progression (AUC=0.72). CONCLUSIONS: Ocular biometric measurements can help risk stratify patients with early angle closure for more severe disease. AS-OCT measurements of biometric parameters describing the angle and iris are predictive of progression from PACS to PAC or AAC, whereas gonioscopy grades are not.

Type: Article
Title: Ocular Biometric Risk Factors for Progression of Primary Angle Closure Disease: The Zhongshan Angle Closure Prevention Trial
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ophtha.2021.10.003
Publisher version: https://doi.org/10.1016/j.ophtha.2021.10.003
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Anterior segment OCT, Disease progression, Ocular biometrics, Primary angle closure, Risk stratification, Angle closure glaucoma
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Ophthalmology
URI: https://discovery.ucl.ac.uk/id/eprint/10136727
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