Table 5
Correlation of retardation values and profile shape values to cup:disc ratio and visual field mean deviation
| Cup:disc ratio | Mean deviation (visual field) | ||
|---|---|---|---|
| Retardation values: | |||
| Normal | +0.07; p >0.1 (0.5%) | −0.03; p >0.1 | |
| Glaucoma (original) | −0.08; p >0.1 (0.6%) | +0.15; p >0.1 | |
| Glaucoma (standardised) | −0.40; p <0.01 (16%) | +0.44; p <0.01 | |
| Profile shape values: | |||
| Normal | +0.01; p >0.1 (0.0%) | −0.05; p >0.1 | |
| Glaucoma (original) | −0.38; p <0.01 (14%) | +0.39; p <0.01 | |
| Glaucoma (standardised) | −0.35; p <0.01 (13%) | +0.35; p <0.01 | |
-
Statistical analysis used for the above correlations:
-
Correlation with cup:disc ratio = Pearson’s product moment correlation with Student’s t test for statistical significance and the coefficient of determination (r 2) expressed in percentages and in parentheses.
-
Correlation with visual field = Spearman’s rank correlation coefficient with statistical significance.
