Table 5.
Baseline OCT features, overall and by clinical diagnosis.
| Overall | Clinical Diagnosis | ||
|---|---|---|---|
| N = 127 | USH2 N= 80 | ARRP N= 47 | |
| Cyst | |||
| None | 70 (55%) | 39 (49%) | 31 (66%) |
| Outside the central 1 mm only | 18 (14%) | 13 (16%) | 5 (11%) |
| Inside the central 1 mm only | 6 (5%) | 4 (5%) | 2 (4%) |
| Both inside and outside the central 1 mm | 31 (24%) | 22 (28%) | 9 (19%) |
| Ungradable | 2 (2%) | 2 (3%) | 0 |
| Definite vitreomacular traction with deformation within central 1mm | |||
| Yes | 1 (1%) | 1 (1%) | 0 |
| No | 123 (97%) | 76 (95%) | 47 (100%) |
| Ungradable | 3 (2%) | 3 (4%) | 0 |
| Definite epiretinal membrane with deformation within central 1mm | |||
| Yes | 25 (20%) | 13 (16%) | 12 (26%) |
| No | 100 (79%) | 65 (81%) | 35 (74%) |
| Ungradable | 2 (2%) | 2 (3%) | 0 |
| OCT EZ areaa (mm2) | |||
| Median (IQR) | 1.5 (0.5, 3.5) | 1.4 (0.4, 3.1) | 2.3 (0.7, 5.7) |
| [Min, Max] | [0.0, 33.4] | [0.0, 33.4] | [0.0, 21.3] |
| Mean (SD) | 3.6 (5.6) | 3.1 (5.7) | 4.3 (5.6) |
| Central subfield thickness(um) | |||
| Median (IQR) | 253 (228, 285) | 247 (223, 280) | 261 (246, 288) |
| [Min, Max] | [137, 519] | [137, 519] | [175, 323] |
| Mean (SD) | 257 (50) | 253 (57) | 264 (33) |
a
1 participant has EZ beyond scan area and therefore ungradable.