Table 3.
Summary Statistics for Demographic and Visual Function Data Stratified by the OCT Classification
| Stage Name | Stage Description |
Frequency (n) | SDDs Present (n) | Sex (% female) | Mean (± SD) |
Median (IQR) |
||
|---|---|---|---|---|---|---|---|---|
| Age (yrs) | BCVA (Letters) | CS (LogCS) | RMDA (min) | |||||
| OCT 0 | Controls | 312 | 55 | 56% | 64 (7) | 86.8 (5.7) | 1.6 (0.2) | 5.8 (4.5–8.5) |
| OCT 1 | Drusen only | 96 | 30 | 53% | 68 (8) | 83.3 (8.9) | 1.5 (0.2) | 8.4 (5.2–13.3) |
| OCT 2 | Drusen and/or RPE abnormalities | 51 | 24 | 45% | 72 (10) | 82.6 (8.3) | 1.4 (0.2) | 11.1 (5.3–20.1) |
The main visual function measure of interest was median RMDA, indicated in bold. BCVA = best-corrected visual acuity; CS = contrast sensitivity; IQR = interquartile range; RMDA = rod-mediated dark adaptation; RPE = retinal pigment epithelium; SD = standard deviation; SSD = subretinal drusenoid deposit.