Table VI.
Additional psychophysical measures: Microperimetry and Dark Adaptation
| Measure | Statistic | Early | Intermediate | Normal | P-value Overall | P-value Early vs Intermediate | P-value Early vs Normal | P-value Intermediate vs Normal |
|---|---|---|---|---|---|---|---|---|
| Microperimetry | ||||||||
| Average Threshold (dB) | N | 32 | 47 | 20 | 0.02 | 0.10 | 0.17 | 0.006 |
| Mean (SD) | 26.45 (2.76) | 25.20 (3.17) | 27.02 (3.63) | |||||
| Min, Median, Max | 18.7, 26.1, 30.6 | 17.9, 25.3, 30.6 | 14.4, 27.7, 31.3 | |||||
| Percent ReducedThreshold (%) | N | 31 | 47 | 20 | 0.001 | 0.03 | 0.09 | <0.001 |
| Mean (SD) | 24.92 (26.33) | 42.32 (35.11) | 15.40 (25.61) | |||||
| Min, Median Max | 0.0, 21.6, 100.0 | 0, 37.8, 100.0 | 0.0, 2.7, 94.6 | |||||
| Dark adaptation and rod intercept (min) | N | 30 | 38 | 21 | <0.001 | <0.001 | 0.09 | <0.001 |
| Mean (SD) | 7.71 (5.03) | 13.18 (6.40) | 6.20 (5.20) | |||||
| Min, Median, Max | 1.9, 6.6, 20.0 | 1.7, 13.3, 20.0 | 1.1, 4.2, 18.4 |
Overall p-value based on Kruskal-Wallis test of difference among medians.
Pair-wise p-values based on Wilcoxon rank sum test of difference between medians.