The quantitative measurements of choroidal thickness and volume in diabetic retinopathy using optical coherence tomography and optical coherence tomography angiography; correlation with vision and foveal avascular zone

Table 5 Foveal Thickness, foveal avascular zone and Choroidal thickness in different study groups (ANOVA) normal participants and patients with diabetes. Post Hoc analysis of subfields choroidal thickness of the studied participants (*Dunnett test (2-sided))

Groups	Control (40 eyes) (M-SD) (μm)	NDR (39eyes) ((M-SD) (μm)	NPDR (64eyes) ((M-SD) (μm)	PDR (33eyes) ((M-SD) (μm)	P-value (ANOVA)
FT (median, range)	247.00 (226–292)	243.00 (183–290) 0.876*	281.00 (201–664) < 0.001*	284.00 (170–499) 0.041*	< 0.001
CMT (Mean)	272.5 ± 22.95	256.94 ± 22.05 *0.550	320.03 ± 89.43 0.003*	305.43 ± 65.50 0.079*	< 0.001
FAZs	0.28 ± 0.09	0.33 ± 0.11 *0.405	0.35 ± 0.18 0.053*	0.37 ± 0.10 0.003*	0.009
FAZd	0.31 ± 0.08	0.38 ± 0.18 *0.550	0.50 ± 0.26 < 0.001*	0.52 ± 0.20 < 0.001*	< 0.001
SFCT	322.50 ± 69.24	308.33 ± 74.45 0.300*	283.45 ± 56.50 0.037*	295.17 ± 95.69 0.299*	0.087
N0.5 CT	322.12 ± 68.99	306.67 ± 80.10 0.985*	271.82 ± 52.51 0.023*	284.88 ± 98.37 0.178*	0.022
N1.5 CT	281.47 ± 61.02	303.09 ± 80.43 0.178*	241.75 ± 55.85 0.031*	254.85 ± 92.76 0.279*	< 0.001
T0.5 CT	306.85 ± 70.82	292.19 ± 72.13 *0.985	275.20 ± 54.76 0.122*	290.37 ± 84.87 0.840*	0.182
T1.5 CT	285.25 ± 58.77	276.70 ± 77.68 0.951*	251.64 ± 65.33 0.097*	264.25 ± 78.23 *0.589	0.047

CT Choroidal thickness, CMT Central macular thickness, SFCT Subfields choroidal thickness, CT N Choroidal thickness at nasal side of fovea (0.5 and 1.5 mm from fovea), CT T Choroidal thickness at temporal side of fovea (0.5 and 1.5 mm from fovea), FAZ (s and d) Foveal avascular zone (superficial and deep)
NDR No diabetic retinopathy, NPDR Nonproliferative diabetic retinopathy, PDR Proliferative diabetic retinopathy

ISSN: 1471-2415