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. 2020 Aug 3:6:35.
doi: 10.1186/s40942-020-00237-w. eCollection 2020.

Reliability of foveal avascular zone measurements in eyes with retinal vein occlusion using optical coherence tomography angiography

Bruno Mauricio Rodrigues de Oliveira  1 , Luis Filipe Nakayama  1 , Bruno Rebello de Godoy  1 , Alexandre Gomes Bortoloti de Azevedo  1 , Flavio Eduardo Hirai  1 , Somaia Mitne  1
Affiliations

Reliability of foveal avascular zone measurements in eyes with retinal vein occlusion using optical coherence tomography angiography

Bruno Mauricio Rodrigues de Oliveira et al. Int J Retina Vitreous. .

Abstract

Background: To evaluate the reliability of foveal avascular zone (FAZ) area measurements using optical coherence tomography angiography (OCTA) in eyes with retinal vein occlusion (RVO).

Methods: Twenty-five OCTA exams of patients with RVO were evaluated retrospectively. Three examiners performed manual measurements of the FAZ, and interrater and intrarater reliability were obtained.

Results: The intraclass correlation coefficient (ICC) for interrater reliability for individual measurements was 0.62 (moderate) with a 95% confidence interval (CI) of 0.40 to 0.79 (p < 0.001). The ICC (95% CI) for intrarater reliability was 0.92 (0.82 to 0.96) for rater A, 0.96 (0.91 to 0.98) for B, and 0.88 (0.76 to 0.94) for C (p < 0.001). In all subanalyses including presence of edema and type of occlusion, interrater reliability was poor/moderate, and intrarater reliability was good/excellent.

Conclusion: The FAZ varies significantly among eyes with RVO, so measurements obtained using OCTA should be analyzed with caution due to the moderate level of reliability among different examiners.

Keywords: Foveal avascular zone; OCT; Retina; Retinal vein occlusion.

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Conflict of interest statement

Competing interestsThe authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
OCTA maps of three different subjects with great variability of foveal avascular zone
See this image and copyright information in PMC

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