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Br J Ophthalmol 82:14-25 doi:10.1136/bjo.82.1.14
  • Original Article
    • Clinical science

Reproducibility of topographic measures of the glaucomatous optic nerve head

Table 2

Values of reproducibility criteria for topographic variables

Variable Paired test % Absolute change Pearson correlation Regression slope Regression intercept Satisfies all criteria
Height variation 0.495 7.22 0.733 0.862 0.034
Mean contour height 0.851 25.00 0.962 0.933 −0.008
Modulation 0.363 7.43 0.764 0.728 0.029
Effective area 0.896 3.75 0.951 0.835 0.160
Neuroretinal rim area 0.836 2.46 0.972 0.879 0.169
Volume below 0.744 7.30 0.953 0.968 0.010 yes
Volume above 0.465 5.08 0.965 0.864 0.022
Half depth area 0.118 9.79 0.904 1.022 0.003 yes
Half depth volume 0.399 20.20 0.846 0.865 −0.013
Maximum cup depth 0.854 5.95 0.937 0.849 −0.090
Average cup depth 0.690 6.09 0.960 1.016 0.000 yes
Cup to disc ratio 0.487 3.71 0.956 0.831 0.081

  • ↵Paired test (p value) compares first and second measurement on the same patient.

  • ↵Average of absolute change as a percentage from the first to second measurement on the same patient.

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