Table 3.
Choroidal parameters of all the patients
| No DR eyes | PRP-untreated NPDR eyes | PRP-untreated PDR eyes | P value | |
|---|---|---|---|---|
| Number of eyes (n) | 22 | 24 | 20 | |
| SCT (um), mean ± SD | 194.18 ± 5.68 | 217.29 ± 14.07 | 229.25 ± 13.89 | P < 0.001*,†,‡,§ |
| Choroid vascular parameters, mean ± SD | ||||
| TCA in mm2 | 0.81 ± 0.06 | 0.86 ± 0.09 | 0.90 ± 0.08 | P < 0.001*,†,‡ |
| LA in mm2 | 0.53 ± 0.05 | 0.54 ± 0.08 | 0.55 ± 0.08 | P = 0.507* |
| SA in mm2 | 0.28 ± 0.03 | 0.31 ± 0.05 | 0.34 ± 0.03 | P < 0.001*,†,‡ |
| L/C ratio | 0.65 ± 0.03 | 0.63 ± 0.05 | 0.61 ± 0.04 | P = 0.019*,†,‡,§ |
DR, diabetic retinopathy; PRP, panretinal photocoagulation; NPDR, non-proliferative diabetic retinopathy; PDR, proliferative diabetic retinopathy; SCT, subfoveal choroidal thickness; SD, standard deviation; TCA, total choroidal area; LA, luminal area; SA, stromal area; L/C ratio, the ratio of the luminal to choroidal area
*: Statistical significance tested by ANOVA for normal distributions and Kruskal–Wallis tests for nonnormal distributions; all comparisons were corrected with the post hoc test
†: Significant difference between mean values of DM with no DR eyes and PRP-untreated NPDR eyes
‡: Significant difference between mean values of DM with no DR eyes and PRP-untreated PDR eyes
§: Significant difference between mean values of PRP-untreated NPDR eyes and PRP-untreated PDR eyes