Choroidal structural changes correlate with severity of diabetic retinopathy in diabetes mellitus

BMC Ophthalmology

Table 5 Choroidal parameters in PRP-untreated and PRP-treated PDR eyes

	PRP-untreated PDR	PRP-treated PDR	P value
Number of eyes (n)	20	20
SCT (um), mean ± SD	229.25 ± 13.89	222.60 ± 11.62	P = 0.231^*
Choroid vascular parameters, mean ± SD
TCA in mm²	0.90 ± 0.08	0.83 ± 0.08	P = 0.448^*
LA in mm²	0.55 ± 0.08	0.52 ± 0.07	P = 0.269^*
SA in mm²	0.34 ± 0.03	0.32 ± 0.03	P = 0.073^*
L/C ratio	0.61 ± 0.04	0.62 ± 0.03	P = 0.228^*

PRP, panretinal photocoagulation; 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 Independent t-test

ISSN: 1471-2415