| | Baseline (mean ± SD) % | 1 day (mean ± SD) % | 1 week (mean ± SD) % | 1 month (mean ± SD) % |
|---|
Whole area (6*6mm2) | 52.95 ± 0.74 | 49.64 ± 0.81* | 50.46 ± 0.91* | 51.4 ± 0.81 |
Fovea Region | 38.22 ± 1.17 | 36.14 ± 1.19* | 36.21 ± 1.2* | 36.35 ± 1.17* |
Parafovea Region | 58.27 ± 0.49 | 55.56 ± 0.56* | 55.91 ± 0.8* | 56.93 ± 0.54* |
Perifovea Region | 54.14 ± 0.83 | 50.59 ± 0.91* | 51.67 ± 1.01* | 52.63 ± 0.9 |
- VD at baseline was compared with VD at 1 day/1 week/1 month respectively using the repeated-measures analysis. The VD of whole area of DPC significantly differ after surgery (F(3,132) = 4.45, P = 0.005). Vessel density was decreased 1 day after surgery (P = 0.001, P = 0.022 at 1 week and 1 month respectively) and gradually recovered to its normal range in 1 month (P = 0.102). The preoperative VD of fovea region was significantly difference from the VD at 1 day/1 week/1 month after surgery (F = (3132) = 11.73, P < 0.001). VD at 1 day/1 week/1 month after surgery decreased significantly (P < 0.001). VD of parafovea region significantly changed after surgery (F(2.71,119.26) = 5.13,P = 0.003). Vessel density of parafovea region was decreased after surgery (P < 0.001, P = 0.01, P = 0.039 at 1 day/1 week/1 month respectively). The perifovea region also changed postoperatively (F(3,132) = 4.09,P = 0.008). the vessel density was decreased at 1 day (P = 0.001) and gradually returned to its preoperatively level in 1 month (P = 0.04, P = 0.142 at 1 week and 1 month respectively). * represented P < 0.05
