Quantification of Microvascular Density of the Optic Nerve Head in Diabetic Retinopathy Using Optical Coherence Tomographic Angiography

Table 2

One-way ANOVA for RPC density and RNFL thickness in OCTA.

RPC density	Group				F value	value
	Healthy controls	No DR	Mild-to-moderate NPDR	Severe NPDR
Whole image, %
Mean ± SD	49.9 ± 2.3	49.0 ± 2.8	47.3 ± 3.9	45.5 ± 3.4	26.2	<0.01
Inside optic disc, %
Mean ± SD	50.8 ± 5.8	49.0 ± 4.9	49.5 ± 6.7	45.8 ± 5.9	8.8	<0.01
Peripapillary,%
Mean ± SD	53.1 ± 2.6	51.7 ± 3.4	49.8 ± 4.6	47.4 ± 4.2	29.6	<0.01
RNFL thickness, μm
Mean ± SD	115.4 ± 10.5	115.1 ± 23.3	109.4 ± 20.0	112.7 ± 20.3	1.5	0.22

RPC, radial peripapillary capillary; RNFL, retinal nerve fiber layer; OCTA, optic coherence tomographic angiography; DR, diabetic retinopathy; NPDR, nonproliferative diabetic retinopathy.