Table 3.

SS-OCTA evaluated the choroidal indices with different radii centered on the macular fovea in control eyes, PDR eyes, NPDR eyes (mean ± SD, p-value).

Variable	Radii	Control	PDR	NPDR	Control vs. PDR	Control vs. NPDR	PDR vs. NPDR
CP		n = 51	n = 53	n = 69	(p/t value)	(p/t value)	(p/t value)
	3 ×3 mm	7.07 ± 0.00	6.75 ± 1.05	7.04 ± 0.07	0.031*/2.221	0.007**/2.833	0.048*/−2.026
	6 ×6 mm	28.26 ± 0.06	27.31 ± 2.60	28.08 ± 0.55	0.009**/2.731	0.026*/2.297	0.035*/−2.155
	9 ×9 mm	63.12 ± 0.71	60.39 ± 5.36	62.69 ± 1.80	0.000***/3.738	0.118/1.517	0.004**/−2.982
	12 ×12 mm	109.76 ± 1.05	104.46 ± 7.97	108.97 ± 2.53	0.000***/4.520	0.063/2.006	0.001***/−3.674
	6–3 mm2	21.20 ± 0.06	20.55 ± 1.77	21.04 ± 0.53	0.009**/2.694	0.047*/2.039	0.056/−1.837
	9–6 mm2	34.85 ± 0.71	33.08 ± 3.30	31.99 ± 12.58	0.000***/3.880	0.122/1.621	0.537/0.620
CVI		n = 51	n = 53	n = 71	(p/t value)	(p/t value)	(p/t value)
	3 ×3 mm	0.29 ± 0.09	0.32 ± 0.12	0.30 ± 0.10	0.160/−1.417	0.517/−0.649	0.373/0.894
	6 ×6 mm	0.26 ± 0.07	0.27 ± 0.09	0.26 ± 0.09	0.302/−1.038	0.941/−0.075	0.338/0.962
	9 ×9 mm	0.24 ± 0.06	0.23 ± 0.07	0.23 ± 0.08	0.802/0.251	0.358/0.922	0.525/0.638
	12 ×12 mm	0.24 ± 0.05	0.21 ± 0.06	0.22 ± 0.07	0.050*/ 1.983	0.072/1.732	0.817/−0.232
	6–3 mm2	0.03 ± 0.04	0.04 ± 0.05	0.04 ± 0.03	0.122/−1.560	0.037*/−2.397	0.954/0.057
	9–6 mm2	0.02 ± 0.02	0.04 ± 0.03	0.04 ± 0.06	0.000***/−3.80	0.025*/−2.275	0.029*/−2.207
CVV		n = 51	n = 53	n = 71	(p/t value)	(p/t value)	(p/t value)
	3 ×3 mm	0.70 ± 0.32	0.85 ± 0.41	0.75 ± 0.39	0.033*/−2.167	0.377/−0.886	0.186/1.330
	6 ×6 mm	2.42 ± 1.01	2.79 ± 1.28	2.49 ± 1.30	0.103/−1.638	0.764/−0.289	0.192/1.312
	9 ×9 mm	4.87 ± 1.91	5.10 ± 2.27	4.66 ± 2.39	0.569/−0.571	0.598/0.512	0.301/1.038
	12 ×12 mm	8.18 ± 2.84	7.71 ± 3.47	7.49 ± 3.63	0.469/0.728	0.254/1.108	0.751/0.318
	6–3 mm2	1.73 ± 0.71	1.94 ± 0.89	1.73 ± 0.93	0.177/−1.360	0.979/−0.025	0.274/1.100
	9–6 mm2	2.45 ± 0.96	2.31 ± 1.07	2.04 ± 1.50	0.497/0.681	0.095/1.6801	0.629/0.484
CT		n = 51	n = 53	n = 69	(p/t value)	(p/t value)	(p/t value)
	3 ×3 mm	339.28 ± 119.25	362.12 ± 91.49	337.55 ± 101.67	0.275/−1.098	0.932/0.086	0.170/1.382
	6 ×6 mm	325.08 ± 113	338.03 ± 85.85	316 ± 93.09	0.511/−0.66	0.631/0.482	0.183/1.34
	9 ×9 mm	302.97 ± 98.63	308.23 ± 78.9	291.35 ± 82.16	0.764/−0.301	0.487/0.697	0.258/1.137
	12 ×12 mm	288.76 ± 84.44	283.52 ± 74.39	274.88 ± 72.16	0.751/0.318	0.351/0.937	0.546/0.606
	6–3 mm2	14.21 ± 16.08	24.1 ± 16.09	21.55 ± 18.6	0.002**/−3.135	0.026*/−2.312	0.428/0.795
	9–6 mm2	22.11 ± 19.26	29.8 ± 12.98	33.09 ± 60.42	0.018*/−2.378	0.213/−1.251	0.661/−0.39

^*p ≤ 0.05, there is a statistical difference;

^**p ≤ 0.01,

^***p ≤ 0.001, there is a significant difference.