Analysis of Foveal Microvascular Abnormalities in Diabetic Retinopathy Using Optical Coherence Tomography Angiography with Projection Artifact Removal

Table 3

Comparisons of the foveal microcirculation parameters between the four study groups.

	Control	No DR	Mild DR	Severe DR	F/H value	value
Vessel density
FD-300, %, mean ± SD	49.82 ± 3.55	48.21 ± 3.93	45.33 ± 4.12	41.87 ± 4.67	21.683	<0.001^d
Parafoveal vessel density
SCP, %, mean ± SD	49.47 ± 3.41	47.56 ± 4.08	42.57 ± 4.94	38.26 ± 5.52	58.526	<0.001^e
DCP, %, mean ± SD	52.85 ± 3.22	50.26 ± 4.54	48.58 ± 4.34	41.86 ± 5.93	30.643	<0.001^f

^dMultiple comparisons are tested using one-way ANOVA with a post hoc test, control > mild DR (), control > severe DR (), no DR > mild DR (), no DR > severe DR (), and mild DR > severe DR (); ^emultiple comparisons are tested using the Kruskal–Wallis test, no DR > severe DR (, after Bonferroni correction), control > severe DR (, after Bonferroni correction), no DR > mild DR (, after Bonferroni correction), mild DR > severe DR (, after Bonferroni correction), and control > mild DR (, after Bonferroni correction); ^fmultiple comparisons are tested using one-way ANOVA with a post hoc test, control > no DR (), control > mild DR (), control > severe DR (), no DR > severe DR (), and mild DR > severe DR ().