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

  • Clinical Investigation
  • Published:
Japanese Journal of Ophthalmology Aims and scope Submit manuscript

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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Acknowledgments

This study was supported and conducted in part by the research project “The preventive study of critical diseases in the elderly through the application of the cohort framework” at the Center for Community-Based Health Research and Education (COHRE), Shimane University, Shimane Japan. The authors are grateful to Ms. Ryoko Takahashi for her technical assistance in digitization of the fundus films.

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Authors and Affiliations

  1. Department of Ophthalmology, Shimane University Faculty of Medicine, Enya 89-1, Izumo, Shimane, 693-8501, Japan

    Masaki Tanito & Akihiro Ohira

  2. Department of Ophthalmology, Yamaguchi University Graduate School of Medicine, Ube, Japan

    Takeshi Sagara

  3. Sagara Eye Clinic, Hagi, Japan

    Takeshi Sagara

  4. Department of Ophthalmology and Visual Science, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan

    Michiya Takamatsu & Yoshiaki Kiuchi

  5. Research and Development Section, Electronics and Optics Division, Kowa Company, Ltd, Hamamatsu, Japan

    Toshiaki Nakagawa

  6. Department of Public Health, Shimane University Faculty of Medicine, Izumo, Japan

    Yasuyuki Fujita

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  1. Masaki Tanito
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  2. Takeshi Sagara
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  3. Michiya Takamatsu
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  4. Yoshiaki Kiuchi
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  5. Toshiaki Nakagawa
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  6. Yasuyuki Fujita
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  7. Akihiro Ohira
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Correspondence to Masaki Tanito.

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Tanito, M., Sagara, T., Takamatsu, M. et al. Intraobserver and interobserver agreement of computer software-assisted optic nerve head photoplanimetry. Jpn J Ophthalmol 58, 56–61 (2014). https://doi.org/10.1007/s10384-013-0280-6

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  • DOI: https://doi.org/10.1007/s10384-013-0280-6

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