Table 4. Comparison of Rates of Change in Retinal Thickness Between Patients With Stage-Progressed vs Non–Stage-Progressed Sickle Cell Retinopathy Measured by Spectral-Domain Optical Coherence Tomography.
| ETDRS subfield | Rate of change in eyes with nonprogressed retinopathy, μm/y | Difference in rate of change in eyes with progressed vs nonprogressed retinopathy (95% CI), μm/y | P value |
|---|---|---|---|
| Central | −0.18 | −0.03 (−0.47 to 0.41) | .89 |
| Inner | |||
| Nasal | −0.99 | 0.30 (−0.11 to 0.72) | .15 |
| Superior | −1.39 | 0.01 (−0.54 to 0.56) | .97 |
| Temporal | −0.75 | −0.81 (−1.32 to −0.30) | .002 |
| Inferior | −0.85 | −0.12 (−0.55 to 0.31) | .59 |
| Outer | |||
| Nasal | −1.00 | 0.79 (0.43 to 1.15) | <.001 |
| Superior | −0.25 | −0.02 (−1.07 to 1.04) | .98 |
| Temporal | −0.97 | −0.14 (−0.98 to 0.69) | .73 |
| Inferior | −1.10 | 0.59 (0.10 to 1.07) | .02 |
Abbreviation: ETDRS, Early-Treatment Diabetic Retinopathy Study.