TABLE 2.
COMPARISON OF ELECTRORETINOGRAPHIC VALUES IN A SUBGROUP OF PATIENTS ≥70 YEARS OLD WITH AGE-RELATED MACULAR DEGENERATION AND AGE-MATCHED CONTROL SUBJECTS
| CASES (N=36) | CONTROLS(N=16) | PVALUES | ||
|---|---|---|---|---|
| DEPENDENT VARIABLE | MEAN ± STANDARD DEVIATION | TTEST | WILCOXON | |
| WAVE A | ||||
| Photopic – amplitude | 24.4 ± 10.2 | 28.0 ± 6.4 | .1253 | .1083 |
| Photopic – latency | 16.1 ± 2.8 | 16.4 ± 2.2 | .7350 | .5117 |
| Max Stim – amplitude | 149.2 ± 59.9 | 187.6 ± 39.7 | .0093* | .0132* |
| Max Stim – latency | 23.1 ± 2.2 | 22.6 ± 1.1 | .2508 | .2064 |
| WAVE B | ||||
| Photopic – amplitude | 72.7 ± 37.3 | 91.4 ± 16.9 | .0162* | .0156* |
| Photopic – latency | 35.5 ± 3.4 | 34.3 ± 2.4 | .1722 | .2261 |
| Scotopic – amplitude | 202.5 ± 87.4 | 223.5 ± 40.1 | .2470 | .1738 |
| Scotopic – latency | 93.8 ± 11.0 | 92.5 ± 8.1 | .6330 | .6118 |
| Max Stim – amplitude | 304.0 ± 130.6 | 359.3 ± 63.0 | .0448 | .0652 |
| Max Stim – latency | 54.5 ± 5.1 | 52.6 ± 4.1 | .1637 | .2459 |
| FLICKER FUSION | ||||
| Amplitude | 60.5 ± 33.5 | 73.8 ± 16.4 | .0592 | .0652 |
| Latency | 35.0 ± 2.6 | 34.6 ± 2.3 | .6423 | .5994 |
*
A-wave maximal response and b-wave photopic amplitude demonstrate significance prior to adjustment for multiple variables.