Table 2.

Summary of Quantitative OCTA Features for Different DR Severity Levels

		Healthy Control n = 33	No-DR n = 51	Mild n = 41	Mod/Severe	Proliferative
Outcomes	Area	Mean (± SD)	Mean (± SD)	Mean (± SD)	n = 37 Mean (± SD)	n = 30 Mean (± SD)
PD of SCC	Parafovea	0.50 (0.02)	0.50 (0.02)	0.48 (0.03)	0.45 (0.04)	0.42 (0.04)
	Temporal	0.46 (0.02)*	0.47 (0.03)*	0.45 (0.04)*	0.39 (0.05)*	0.33 (0.07)*
	Nasal	0.45 (0.04)*	0.46 (0.03)*	0.46 (0.04)*	0.40 (0.05)*	0.35 (0.08)*
FD of SCC	Parafovea	1.72 (0.01)	1.72 (0.01)	1.71 (0.01)	1.70 (0.01)	1.68 (0.02)
	Temporal	1.70 (0.01)*	1.71 (0.01)*	1.70 (0.01)*	1.68 (0.02)*	1.65 (0.05)*
	Nasal	1.71 (0.01)*	1.70 (0.01)*	1.70 (0.01)*	1.68 (0.02)*	1.66 (0.05)*
PD of DCC	Parafovea	0.49 (0.02)	0.48 (0.03)	0.47 (0.02)	0.44 (0.04)	0.43 (0.05)
	Temporal	0.50 (0.02)	0.48 (0.02)	0.48 (0.03)	0.41 (0.07)	0.39 (0.09)
	Nasal	0.50 (0.03)	0.48 (0.03)	0.47 (0.03)	0.38 (0.08)	0.39 (0.08)

Outcomes grouped according to retinal topography of 3 × 3 mm scanning areas. For the outcomes of the SCC, the area directly nasal to the optic disc was excluded because it showed significantly higher values than the supero- and inferonasal areas. Values in bold letters are significantly different to outcomes of DR severity one stage lower. Values marked with * are significantly different to values measured in the parafovea. The P values were adjusted according to the Tukey multiple testing method.

Mod = moderate.