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Intraobserver variability in optical coherence tomography.

Publication ,  Journal Article
Browning, DJ; Fraser, CM
Published in: Am J Ophthalmol
September 2004

PURPOSE: To assess the intraobserver variability of optical coherence tomography (OCT) in patients with clinically stable maculas. DESIGN: Retrospective, observational case series using a diagnostic instrument. METHODS: Retrospective study. setting. Private retina practice. patient population. Twenty-two eyes of 19 patients, each studied twice within 4 months. observation procedure. Optical coherence tomograph measurements of the macula obtained by two photographers. main outcome measures. Ordinary least products (OLP) and Bland-Altman analysis of OCT data. RESULTS: No fixed or proportional bias was detected in foveal zone thickness and total macular volume between measurements of either of the OCT operators. The coefficient of repeatability for foveal zone thickness was 37.0 microm for photographer 1 and 34.8 microm for photographer 2. The coefficient of repeatability for total macular volume was 0.29 mm(3) for photographer 1 and 0.10 mm(3) for photographer 2. CONCLUSION: Foveal zone thickness and total macular volume measurements show low intraobserver variability when analyzed by OLP and Bland-Altman techniques. Bounds are given for foveal zone thickness and total macular volume for which longitudinal OCT measurements by the same operator can be considered to reflect natural history or intervention effects rather than intraobserver variability.

Duke Scholars

Published In

Am J Ophthalmol

DOI

ISSN

0002-9394

Publication Date

September 2004

Volume

138

Issue

3

Start / End Page

477 / 479

Location

United States

Related Subject Headings

  • Tomography, Optical Coherence
  • Retrospective Studies
  • Retinal Diseases
  • Photography
  • Ophthalmology & Optometry
  • Observer Variation
  • Macula Lutea
  • Humans
  • Diagnostic Techniques, Ophthalmological
  • 1117 Public Health and Health Services
 

Citation

APA
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MLA
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Browning, D. J., & Fraser, C. M. (2004). Intraobserver variability in optical coherence tomography. Am J Ophthalmol, 138(3), 477–479. https://doi.org/10.1016/j.ajo.2004.03.014
Browning, David J., and Christina M. Fraser. “Intraobserver variability in optical coherence tomography.Am J Ophthalmol 138, no. 3 (September 2004): 477–79. https://doi.org/10.1016/j.ajo.2004.03.014.
Browning DJ, Fraser CM. Intraobserver variability in optical coherence tomography. Am J Ophthalmol. 2004 Sep;138(3):477–9.
Browning, David J., and Christina M. Fraser. “Intraobserver variability in optical coherence tomography.Am J Ophthalmol, vol. 138, no. 3, Sept. 2004, pp. 477–79. Pubmed, doi:10.1016/j.ajo.2004.03.014.
Browning DJ, Fraser CM. Intraobserver variability in optical coherence tomography. Am J Ophthalmol. 2004 Sep;138(3):477–479.
Journal cover image

Published In

Am J Ophthalmol

DOI

ISSN

0002-9394

Publication Date

September 2004

Volume

138

Issue

3

Start / End Page

477 / 479

Location

United States

Related Subject Headings

  • Tomography, Optical Coherence
  • Retrospective Studies
  • Retinal Diseases
  • Photography
  • Ophthalmology & Optometry
  • Observer Variation
  • Macula Lutea
  • Humans
  • Diagnostic Techniques, Ophthalmological
  • 1117 Public Health and Health Services