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

BMC Ophthalmology

Table 4 Choroidal parameters in PRP-untreated and PRP-treated NPDR eyes

	PRP-untreated NPDR	PRP-treated NPDR	P value
Number of eyes (n)	24	17
SCT (um), mean ± SD	217.29 ± 14.07	214.94 ± 8.78	P = 0.068^*
Choroid vascular parameters, mean ± SD
TCA in mm²	0.86 ± 0.09	0.79 ± 0.12	P = 0.160^*
LA in mm²	0.54 ± 0.08	0.50 ± 0.11	P = 0.394^*
SA in mm²	0.31 ± 0.05	0.29 ± 0.06	P = 0.208^*
L/C ratio	0.63 ± 0.05	0.63 ± 0.03	P = 0.204^*

PRP, panretinal photocoagulation; PRP, panretinal photocoagulation; NPDR, non-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