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01.01.2014 | Clinical Investigation

Intraobserver and interobserver agreement of computer software-assisted optic nerve head photoplanimetry

verfasst von: Masaki Tanito, Takeshi Sagara, Michiya Takamatsu, Yoshiaki Kiuchi, Toshiaki Nakagawa, Yasuyuki Fujita, Akihiro Ohira

Erschienen in: Japanese Journal of Ophthalmology | Ausgabe 1/2014

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Abstract

Purpose

To report the reproducibility profile of optic nerve head parameters obtained by computer software-assisted fundus photoplanimetry.

Methods

Fundus photographs obtained during a population-based health survey (Sakurae Study) were planimetrically analyzed using newly developed computer software, CDSketch. The parameters assessed included vertical and horizontal cup-to-disc (C/D) ratios, superior and inferior rim-to-disc (R/D) ratios, disc and cup vertical-to-horizontal (V/H) ratios, and disc-macular distance-to-disc diameter (DM/DD) ratio. For intraobserver and interobserver agreement assessments, we calculated the coefficients of variation (CVs) and intraclass correlation coefficients (ICCs) of the mean of three measurements obtained by one observer and a one-time measurement by three observers, respectively.

Results

The intraobserver CVs were between 2.4 % (DM/DD ratio) and 11.0 % (inferior R/D ratio), and the ICCs were between 0.868 (cup V/H ratio) and 0.976 (DM/DD ratio); all intraobserver ICCs had almost perfect agreement (>0.81). The interobserver CVs were between 2.6 % (disc V/H ratio) and 18.0 % (inferior R/D ratio), and the ICCs were between 0.762 (cup V/H ratio) and 0.930 (DM/DD ratio); the interobserver ICCs were categorized as substantial (0.61–0.80) for the inferior R/D and cup V/H ratios and as almost perfect for the other five parameters.

Conclusions

The consistent profiles of the planimetric parameters suggest the suitability of software-assisted photoplanimetry for assessing optic disc characteristics in glaucoma clinical study and practice.

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Titel: Intraobserver and interobserver agreement of computer software-assisted optic nerve head photoplanimetry
verfasst von: Masaki Tanito
Takeshi Sagara
Michiya Takamatsu
Yoshiaki Kiuchi
Toshiaki Nakagawa
Yasuyuki Fujita
Akihiro Ohira
Publikationsdatum: 01.01.2014
Verlag: Springer Japan
Erschienen in: Japanese Journal of Ophthalmology / Ausgabe 1/2014
Print ISSN: 0021-5155
Elektronische ISSN: 1613-2246
DOI: https://doi.org/10.1007/s10384-013-0280-6

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Intraobserver and interobserver agreement of computer software-assisted optic nerve head photoplanimetry

Abstract

Purpose

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Conclusions

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