Evidence map›Paper›PMID 32942063›Full record

ArticleOphthalmology. Glaucoma

Differences in Ocular Biometric Measurements among Subtypes of Primary Angle Closure Disease: The Chinese American Eye Study.

Benjamin Y Xu, Siqi Liang, Anmol A Pardeshi, Jacob Lifton, Sasan Moghimi, Juan Pablo Lewinger, Rohit Varma

Open access · greenAbstract read
In one paragraph

Article in Ophthalmology. Glaucoma. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.6field-weighted citation impact, top 16% of its field
1 · What the graph read from 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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 16 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 1 country.

Benjamin Y XuRoski Eye Institute, Department of Ophthalmology, Keck School of Medicine at the University of Southern California, Los Angeles, California. Electronic address: benjamin.xu@med.usc.edu.
Siqi LiangDepartment of Computer Science, University of Southern California, Los Angeles, California.
Anmol A PardeshiRoski Eye Institute, Department of Ophthalmology, Keck School of Medicine at the University of Southern California, Los Angeles, California.
Jacob LiftonKeck School of Medicine at the University of Southern California, Los Angeles, California.
Sasan MoghimiHamilton Glaucoma Center, Shiley Eye Institute, Department of Ophthalmology, University of California, San Diego, La Jolla, California.
Juan Pablo LewingerDepartment of Preventive Medicine, University of Southern California, Los Angeles, California.
Rohit VarmaSouthern California Eye Institute, CHA Hollywood Presbyterian Medical Center, Los Angeles, California.
University of Southern California · USPenn Presbyterian Medical Center · USUniversity of California San Diego · US

Funding

Southern California Clinical and Translational Science InstituteUL1TR001855 · NCATS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI Thomas A Buchanan, Michele D. Kipke · 2016 to 2026
$81.3M
Chinese American Eye StudyU10EY017337 · NEI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI VARMA, ROHIT · 2009 to 2013
$10.2M
Ophthalmic Therapeutics Engineering CoreP30EY029220 · NEI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI Qifa Zhou · 2018 to 2026
$6.5M
Development and Validation of Quantitative Anterior Segment OCT-based Methods to Evaluate Patients with Primary Angle Closure DiseaseK23EY029763 · NEI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI XU, BENJAMIN Y. · 2019 to 2023
$1.1M
NCATS NIH HHS UL1 TR001855NEI NIH HHS K23 EY029763NEI NIH HHS P30 EY029220NEI NIH HHS U10 EY017337
6 · The paper itself

Abstract

purposeTo assess differences in ocular biometric measurements between primary angle closure suspect (PACS) eyes and primary angle closure (PAC) and primary angle closure glaucoma (PACG) eyes.

designCross-sectional study.

participantsPatients with primary angle closure disease (PACD) were identified from the Chinese American Eye Study, a population-based study in Los Angeles, California.

methodsPatients previously underwent complete ocular examinations including gonioscopy and anterior segment (AS)-OCT imaging with the Tomey CASIA SS-1000 (Tomey Corporation). Four AS-OCT images were analyzed per eye. Averaged and sectoral measurements of biometric parameters, including angle recess area (ARA), trabecular iris space area (TISA), iris area, iris curvature, lens vault, anterior chamber depth, and anterior chamber area, were compared between early PACD (PACS) and late PACD (PAC and PACG) groups. Machine learning classifiers that attempt to differentiate between early and late PACD eyes were developed by applying different regression algorithms to a training dataset of sectoral parameter measurements. Classifier performance was assessed using an independent test dataset.

main outcome measuresAveraged and sectoral measurements of biometric parameters.

resultsTwo hundred ninety-eight eyes (231 PACS, 67 PAC or PACG) of 298 patients were analyzed. No difference was found in averaged biometric measurements between the 2 groups before (P > 0.09) or after (P > 0.14) adjusting for age and gender. Differences (P < 0.04) between the 2 groups were found for 11 sectoral parameter measurements, including ARA and TISA. The performance of machine learning classifiers developed using sectoral parameter measurements was poor on the independent test dataset for all regression algorithms (area under the receiver operating characteristic curve, 0.529-0.628).

conclusionsDifferences in biometric measurements between subtypes of PACD eyes were small in a population-based cohort of Chinese Americans. The poor performance of classifiers based on these measurements highlights potential challenges of developing quantitative methods to detect late PACD.

Indexed as

AsianIntraocular PressureBiometryCross-Sectional StudiesHumansTomography, Optical CoherenceAngle closureAnterior chamber angleAnterior segment OCTGonioscopyMachine learningPrimary angle closure disease

Identifiers

PMID32942063
PMCPMC7956120
OpenAlexW3086837615

What OpenQuestion holds

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LicenceTDM
Read underepoch 390

Registered trials

None linked

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.