Table 2.
Showing means and standard deviations (SDs) for ffERG amplitudes, implicit times (IT), best corrected visual acuity (BCVA), central retinal thickness (CRT), difference Δ, and p-values for the Wilcoxon Signed Ranks Test at baseline and at 18-month follow-up of 39 eyes
| Rod response b-wave (Ampl) | Combined response a-wave (Ampl) | 30-Hz flicker Cone response (LA) b-wave (Ampl) | 30-Hz flicker Cone response (LA) b-wave (IT) | BCVA (letters) | CRT (µm) | |
|---|---|---|---|---|---|---|
| Baseline | 201.8 ± 64.0 | 154.6 ± 53.8 | 57.9 ± 19.3 | 30.9 ± 2.4 | 65.1 ± 12.1 | 315.4 ± 89.5 |
| 18-month follow-up | 175.7 ± 75.0 | 138.0 ± 49.0 | 54.7 ± 21.9 | 31.5 ± 2.5 | 71.5 ± 9.2 | 222.3 ± 33.1 |
| Difference Δ | 26.2 ± 63.3 | 16.6 ± 47.7 | 3.2 ± 13.3 | .6 ± 2.6 | 6.4 ± 10.7 | 93.0 ± 82.8 |
| p-value Wilcoxon Signed Ranks Test | 0.026 | 0.043 | 0.171 | 0.105 | 0.001 | 0.000 |
It compares the response of the rod b-wave, the combined rod-cone a-wave, and the isolated 30-Hz flicker cone b-wave (LA light-adapted)
p-value < 0.05 considered to be statistically significant