TABLE 1.
COMPARISON OF ELECTRORETINOGRAPHIC VALUES IN PATIENTS WITH AGE-RELATED MACULAR DEGENERATION AND AGE-MATCHED CONTROL SUBJECTS
| CASES (N=52) | CONTROLS(N=16) | PVALUES | ||
|---|---|---|---|---|
| DEPENDENT VARIABLE | MEAN ± STANDARD DEVIATION | TTEST | WILCOXON | |
| Wave A | ||||
| Photopic – amplitude | 26.7 ± 10.7 | 28 ± 6.4 | .5492 | .4478 |
| Photopic – latency | 16 ± 2.5 | 16.4 ± 2.2 | .5564 | .9077 |
| Max Stim – amplitude | 163.3 ± 58.5 | 187.6 ± 39.7 | .0657 | .1565 |
| Max Stim – latency | 22.9 ± 2.1 | 22.6 ± 1.1 | .5262 | .7277 |
| Wave B | ||||
| Photopic – amplitude | 76.7 ± 36.2 | 91.4 ± 16.9 | .0296* | .0336* |
| Photopic – latency | 34.8 ± 3.2 | 34.3 ± 2.4 | .5141 | .6177 |
| Scotopic – amplitude | 216.9 ± 83.5 | 233.5 ± 40.1 | .6718 | .5863 |
| Scotopic – latency | 92.3 ± 10.5 | 92.5 ± 8.1 | .9364 | .9414 |
| Max Stim – amplitude | 321 ± 120 | 359.3 ± 63 | .1010 | .1982 |
| Max Stim – latency | 54.2 ± 4.8 | 52.6 ± 4.1 | .2208 | .3326 |
| Flicker fusion | ||||
| Amplitude | 62.2 ± 30.1 | 73.8 ± 16.4 | .0518 | .0602 |
| Latency | 34.8 ± 2.4 | 34.6 ± 2.3 | .7953 | .7317 |
*
Photopic b-wave amplitudes demonstrate significance prior to adjustment for multiple variables.