Sources of longitudinal variability in optical coherence tomography nerve-fibre layer measurements
Identifieur interne : 00B003 ( Main/Merge ); précédent : 00B002; suivant : 00B004Sources of longitudinal variability in optical coherence tomography nerve-fibre layer measurements
Auteurs : L. Kagemann [États-Unis] ; T. Mumcuoglu [États-Unis] ; G. Wollstein [États-Unis] ; R. Bilonick [États-Unis] ; H. Ishikawa [États-Unis] ; K A Townsend [États-Unis] ; M. Gabriele [États-Unis] ; J G Fujimoto [États-Unis] ; J S Schuman [États-Unis]Source :
- British Journal of Ophthalmology [ 0007-1161 ] ; 2008-06.
English descriptors
- KwdEn :
- Actual difference, Average rnfl thickness, Baseline, Baseline visit, Carl zeiss meditec, Coherence, Cohort study, Field engineer, Glaucoma, Glaucoma subjects, Glaucomatous eyes, Healthy subjects, Hierarchical design, Icc, Intraclass correlation coefficients, Layer thickness, Massachusetts institute, Nasal quadrant, Nerve fiber layer thickness measurements, Normal eyes, Ophthalmol, Optical coherence tomography, Other sources, Pittsburgh school, Present study, Quadrant, Reproducibility, Retinal layer, Rnfl, Rnfl measurements, Rnfl scan protocol, Rnfl thickness, Scan, Scan variance components, Signal strength, Significant difference, Significant differences, Significant values, Single subject, Square root, Stratusoct, Stratusoct measurements, Stratusoct rnfl measurements, Subject variance component, Subject variance components, Subjects days scans, Summary table, Superior quadrant, Temporal quadrant, Tomography, Total variance, True value, Variance, Variance component, Variance components.
- Teeft :
- Actual difference, Average rnfl thickness, Baseline, Baseline visit, Carl zeiss meditec, Coherence, Cohort study, Field engineer, Glaucoma, Glaucoma subjects, Glaucomatous eyes, Healthy subjects, Hierarchical design, Icc, Intraclass correlation coefficients, Layer thickness, Massachusetts institute, Nasal quadrant, Nerve fiber layer thickness measurements, Normal eyes, Ophthalmol, Optical coherence tomography, Other sources, Pittsburgh school, Present study, Quadrant, Reproducibility, Retinal layer, Rnfl, Rnfl measurements, Rnfl scan protocol, Rnfl thickness, Scan, Scan variance components, Signal strength, Significant difference, Significant differences, Significant values, Single subject, Square root, Stratusoct, Stratusoct measurements, Stratusoct rnfl measurements, Subject variance component, Subject variance components, Subjects days scans, Summary table, Superior quadrant, Temporal quadrant, Tomography, Total variance, True value, Variance, Variance component, Variance components.
Abstract
Aims: The purpose of this study was to compare the day-to-day reproducibility of optical coherence tomography (OCT; StratusOCT, Carl Zeiss Meditec, Dublin, CA) measurements of retinal nerve-fibre layer (RNFL) measurements at time points 1 year apart. Methods: One eye in each of 11 healthy subjects was examined using the StratusOCT fast RNFL scan protocol. Three fast RNFL scans with signal strength ⩾7 were obtained on each of 3 days within a month. This protocol was repeated after 12 months. A linear mixed effects model fitted to the nested data was used to compute the variance components. Results: The square root of the variance component that was attributed to the differences between subjects was 7.17 μm in 2005 and 7.28 μm in 2006. The square roots of the variance component due to differences between days within a single subject were 1.95 μm and 1.50 μm, respectively, and for within day within a single subject were 2.51 μm and 2.55 μm, respectively. There were no statistically significant differences for any variance component between the two testing occasions. Conclusions: Measurement error variance remains similar from year to year. Day and scan variance component values obtained in a cohort study may be safely applied for prediction of long-term reproducibility.
Url:
DOI: 10.1136/bjo.2007.129312
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Ishikawa</name></author><author><name sortKey="Townsend, K A" sort="Townsend, K A" uniqKey="Townsend K" first="K A" last="Townsend">K A Townsend</name></author><author><name sortKey="Gabriele, M" sort="Gabriele, M" uniqKey="Gabriele M" first="M" last="Gabriele">M. Gabriele</name></author><author><name sortKey="Fujimoto, J G" sort="Fujimoto, J G" uniqKey="Fujimoto J" first="J G" last="Fujimoto">J G Fujimoto</name></author><author><name sortKey="Schuman, J S" sort="Schuman, J S" uniqKey="Schuman J" first="J S" last="Schuman">J S Schuman</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:A4BEB2A6D74858C4B9355B3BF8F23B568976EE6E</idno><date when="2008" year="2008">2008</date><idno type="doi">10.1136/bjo.2007.129312</idno><idno type="url">https://api.istex.fr/document/A4BEB2A6D74858C4B9355B3BF8F23B568976EE6E/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002677</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002677</idno><idno type="wicri:Area/Istex/Curation">002677</idno><idno type="wicri:Area/Istex/Checkpoint">002002</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">002002</idno><idno type="wicri:doubleKey">0007-1161:2008:Kagemann L:sources:of:longitudinal</idno><idno type="wicri:Area/Main/Merge">00B003</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Sources of longitudinal variability in optical coherence tomography nerve-fibre layer measurements</title><author><name sortKey="Kagemann, L" sort="Kagemann, L" uniqKey="Kagemann L" first="L" last="Kagemann">L. Kagemann</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region><settlement type="city">Pittsburgh</settlement></placeName><orgName type="university">Université de Pittsburgh</orgName></affiliation></author><author><name sortKey="Mumcuoglu, T" sort="Mumcuoglu, T" uniqKey="Mumcuoglu T" first="T" last="Mumcuoglu">T. Mumcuoglu</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Wollstein, G" sort="Wollstein, G" uniqKey="Wollstein G" first="G" last="Wollstein">G. Wollstein</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Bilonick, R" sort="Bilonick, R" uniqKey="Bilonick R" first="R" last="Bilonick">R. Bilonick</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Ishikawa, H" sort="Ishikawa, H" uniqKey="Ishikawa H" first="H" last="Ishikawa">H. Ishikawa</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region><settlement type="city">Pittsburgh</settlement></placeName><orgName type="university">Université de Pittsburgh</orgName></affiliation></author><author><name sortKey="Townsend, K A" sort="Townsend, K A" uniqKey="Townsend K" first="K A" last="Townsend">K A Townsend</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Gabriele, M" sort="Gabriele, M" uniqKey="Gabriele M" first="M" last="Gabriele">M. Gabriele</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region><settlement type="city">Pittsburgh</settlement></placeName><orgName type="university">Université de Pittsburgh</orgName></affiliation></author><author><name sortKey="Fujimoto, J G" sort="Fujimoto, J G" uniqKey="Fujimoto J" first="J G" last="Fujimoto">J G Fujimoto</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA</wicri:regionArea><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Schuman, J S" sort="Schuman, J S" uniqKey="Schuman J" first="J S" last="Schuman">J S Schuman</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region></placeName></affiliation><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA</wicri:regionArea><placeName><region type="state">Pennsylvanie</region><settlement type="city">Pittsburgh</settlement></placeName><orgName type="university">Université de Pittsburgh</orgName></affiliation></author></analytic><monogr></monogr><series><title level="j">British Journal of Ophthalmology</title><title level="j" type="abbrev">Br J Ophthalmol</title><idno type="ISSN">0007-1161</idno><idno type="eISSN">1468-2079</idno><imprint><publisher>BMJ Publishing Group Ltd.</publisher><pubPlace>BMA House, Tavistock Square, London, WC1H 9JR</pubPlace><date type="published" when="2008-06">2008-06</date><biblScope unit="volume">92</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="806">806</biblScope></imprint><idno type="ISSN">0007-1161</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0007-1161</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Actual difference</term><term>Average rnfl thickness</term><term>Baseline</term><term>Baseline visit</term><term>Carl zeiss meditec</term><term>Coherence</term><term>Cohort study</term><term>Field engineer</term><term>Glaucoma</term><term>Glaucoma subjects</term><term>Glaucomatous eyes</term><term>Healthy subjects</term><term>Hierarchical design</term><term>Icc</term><term>Intraclass correlation coefficients</term><term>Layer thickness</term><term>Massachusetts institute</term><term>Nasal quadrant</term><term>Nerve fiber layer thickness measurements</term><term>Normal eyes</term><term>Ophthalmol</term><term>Optical coherence tomography</term><term>Other sources</term><term>Pittsburgh school</term><term>Present study</term><term>Quadrant</term><term>Reproducibility</term><term>Retinal layer</term><term>Rnfl</term><term>Rnfl measurements</term><term>Rnfl scan protocol</term><term>Rnfl thickness</term><term>Scan</term><term>Scan variance components</term><term>Signal strength</term><term>Significant difference</term><term>Significant differences</term><term>Significant values</term><term>Single subject</term><term>Square root</term><term>Stratusoct</term><term>Stratusoct measurements</term><term>Stratusoct rnfl measurements</term><term>Subject variance component</term><term>Subject variance components</term><term>Subjects days scans</term><term>Summary table</term><term>Superior quadrant</term><term>Temporal quadrant</term><term>Tomography</term><term>Total variance</term><term>True value</term><term>Variance</term><term>Variance component</term><term>Variance components</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Actual difference</term><term>Average rnfl thickness</term><term>Baseline</term><term>Baseline visit</term><term>Carl zeiss meditec</term><term>Coherence</term><term>Cohort study</term><term>Field engineer</term><term>Glaucoma</term><term>Glaucoma subjects</term><term>Glaucomatous eyes</term><term>Healthy subjects</term><term>Hierarchical design</term><term>Icc</term><term>Intraclass correlation coefficients</term><term>Layer thickness</term><term>Massachusetts institute</term><term>Nasal quadrant</term><term>Nerve fiber layer thickness measurements</term><term>Normal eyes</term><term>Ophthalmol</term><term>Optical coherence tomography</term><term>Other sources</term><term>Pittsburgh school</term><term>Present study</term><term>Quadrant</term><term>Reproducibility</term><term>Retinal layer</term><term>Rnfl</term><term>Rnfl measurements</term><term>Rnfl scan protocol</term><term>Rnfl thickness</term><term>Scan</term><term>Scan variance components</term><term>Signal strength</term><term>Significant difference</term><term>Significant differences</term><term>Significant values</term><term>Single subject</term><term>Square root</term><term>Stratusoct</term><term>Stratusoct measurements</term><term>Stratusoct rnfl measurements</term><term>Subject variance component</term><term>Subject variance components</term><term>Subjects days scans</term><term>Summary table</term><term>Superior quadrant</term><term>Temporal quadrant</term><term>Tomography</term><term>Total variance</term><term>True value</term><term>Variance</term><term>Variance component</term><term>Variance components</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Aims: The purpose of this study was to compare the day-to-day reproducibility of optical coherence tomography (OCT; StratusOCT, Carl Zeiss Meditec, Dublin, CA) measurements of retinal nerve-fibre layer (RNFL) measurements at time points 1 year apart. Methods: One eye in each of 11 healthy subjects was examined using the StratusOCT fast RNFL scan protocol. Three fast RNFL scans with signal strength ⩾7 were obtained on each of 3 days within a month. This protocol was repeated after 12 months. A linear mixed effects model fitted to the nested data was used to compute the variance components. Results: The square root of the variance component that was attributed to the differences between subjects was 7.17 μm in 2005 and 7.28 μm in 2006. The square roots of the variance component due to differences between days within a single subject were 1.95 μm and 1.50 μm, respectively, and for within day within a single subject were 2.51 μm and 2.55 μm, respectively. There were no statistically significant differences for any variance component between the two testing occasions. Conclusions: Measurement error variance remains similar from year to year. Day and scan variance component values obtained in a cohort study may be safely applied for prediction of long-term reproducibility.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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