Table 4. Changes in Vascular Leakage and Visual Acuity during Follow Up in Behçet Retinal Vasculitis.
| Change in leakage* | Change in VA† | Overall | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Peripheral retinal vasculitis | Posterior pole-involved retinal vasculitis | ||||||||
| Total | VA loss | No change in VA | VA gain | Total | VA loss | No change in VA | VA gain | ||
| Worsened (%) | 2 (8.7) | 1 (4.3) | 1 (4.3) | 0 (0) | 10 (15.9) | 3 (4.8) | 7 (11.1) | 0 (0) | 12 (13.9) |
| No change (%) | 17 (73.9) | 1 (4.3) | 12 (52.2) | 4 (17.4) | 32 (50.8) | 5 (7.9) | 23 (36.5) | 4 (6.3) | 49 (56.9) |
| Improved (%) | 4 (17.4) | 1 (4.3) | 3 (13.0) | 0 (0) | 21 (33.3) | 3 (4.8) | 13 (20.6) | 5 (7.9) | 25 (29.1) |
| Total (%) | 23 (100) | 3 (13.0) | 16 (69.6) | 4 (17.4) | 63 (100) | 11 (17.5) | 43 (68.3) | 9 (14.3) | 86 (100) |
| Coefficient of correlation (Kendall's tau, τ) | τ=-0.034 (p=0.75) | τ=0.199 (p=0.092) | |||||||
VA, visual acuity.
Follow up=time interval between the baseline and the closest-to-two year follow-up visit. p-value<0.05 is considered statistically significant.
*Retinal vascular leakage, optic disc hyperfluorescence, and macular leakage were compared collectively between the initial and at 2 year time point within a 3 months window. Worsened=there was an increase in the magnitude of the overall vascular leakage, No change=there was no discernible difference in the degree of leakage, Improved=there was a decrease in the magnitude of the overall vascular leakage.
†For a change in VA to be considered a gain, there had to be an improvement of at least three Snellen chart lines between the initial VA and VA at 2 year time point within a 3 months window. A drop of at least three Snellen chart lines was considered a loss of VA. A change in VA of fewer than three lines was regarded as no change.