Region of interest | Parafoveal capillary density | ||||||
Mean±SD% | Kruskal-Wallis tests | Post hoc pairwise comparisons | |||||
Control | NP-SCR | P-SCR | Control versus NP-SCR | Control versus P-SCR | NP-SCR versus P-SCR | ||
Entire Image | 41.45±1.95 | 37.19±4.00 | 36.43±3.46 | P<0.001* | P<0.001* | P<0.001* | P=0.980 |
Temporal | 41.53±2.03 | 36.28±5.58 | 34.92±5.86 | P<0.001* | P<0.001* | P<0.001* | P=1.000 |
Nasal | 41.79±2.13 | 37.81±3.65 | 37.65±2.84 | P<0.001* | P<0.001* | P<0.001* | P=1.000 |
Superior | 41.38±2.18 | 36.98±4.43 | 35.95±3.93 | P<0.001* | P<0.001* | P<0.001* | P=1.000 |
Inferior | 41.15±2.16 | 37.46±4.32 | 36.97±3.22 | P<0.001* | P<0.001* | P<0.001* | P=1.000 |
Per cent yellow area | |||||||
Entire image | 4.59±3.75 | 15.94±14.90 | 18.00±11.72 | P<0.001* | P<0.001* | P<0.001* | P=0.833 |
Temporal | 4.31±4.58 | 19.94±22.71 | 24.07±20.18 | P<0.001* | P<0.001* | P<0.001* | P=0.689 |
Nasal | 3.75±2.96 | 13.49±12.40 | 13.44±10.60 | P<0.001* | P<0.001* | P<0.001* | P=1.000 |
Superior | 4.71±4.61 | 16.56±16.08 | 20.76±14.37 | P<0.001* | P<0.001* | P<0.001* | P=0.614 |
Inferior | 5.59±4.31 | 14.99±16.13 | 15.12±11.74 | P=0.008* | P=0.023* | P=0.017* | P=1.000 |
Per cent red area | |||||||
Entire image | 0.76±0.92 | 5.96±9.65 | 6.92±6.62 | P<0.001* | P=0.001* | P<0.001* | P=0.346 |
Temporal | 0.60±0.91 | 9.41±17.39 | 12.65±15.51 | P<0.001* | P=0.002* | P<0.001* | P=0.568 |
Nasal | 0.51±0.95 | 4.05±5.97 | 3.91±4.75 | P<0.001* | P<0.001* | P<0.001* | P=1.000 |
Superior | 0.86±1.25 | 6.15±10.69 | 8.43±9.85 | P<0.001* | P=0.004* | P<0.001* | P=0.178 |
Inferior | 0.99±1.27 | 5.47±12.44 | 4.44±5.38 | P=0.011* | P=0.035* | P=0.017* | P=1.000 |
*P<0.05.
NP-SCR, non-proliferative sickle cell retinopathy; P-SCR, proliferative sickle cell retinopathy.