Table 3. Changes in the diameters of the choroidal vein after PDT in the half-dose PDT group.
|
Day 4 |
Month 1 |
Month 3 |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Vertical diameter | P value | Horizontal diameter | Vertical diameter | P value | Horizontal diameter | Vertical diameter | P value | Horizontal diameter | |
| Mean±SEM relative diameter of the choroidal vein (%) | 84.6±3.0 | 0.003 | 100.1±1.1 | 73.4±3.4 | <0.001 | 95.8±2.8 | 70.8±4.2 | <0.001 | 96.2±1.8 |
| (Mean±SEM diameter of the choroidal vein) (μm) inside the PDT-applied area | (198±21) | (396±52) | (169±16) | (383±55) | (163±16) | (382±53) | |||
| Mean±SEM relative diameter of the choroidal vein (%) | 91.2±1.8 | <0.001 | 100.2±0.3 | 80.9±2.3 | <0.001 | 99.8±0.3 | 80.8±1.9 | <0.001 | 97.1±1.8 |
| (Mean±SEM diameter of the choroidal vein) (μm) outside the PDT-applied area | (186±12) | (401±27) | (165±12) | (400±28) | (164±10) | (389±29) | |||
Abbreviations: SEM, standard error of the mean; PDT, photodynamic therapy.
Relative diameter of the choroidal vein shows the percentage change in diameter of the choroidal vein after PDT compared with baseline. Comparisons between the vertical diameter and the horizontal diameter were made using Mann–Whitney U test. P values <0.05 were considered to be statistically significant.