Reliability of Using Retinal Vascular Fractal Dimension as a Biomarker in the Diabetic Retinopathy Detection

Table 2

Comparison between FD values in different DR groups (ANOVA test).

DR grade			Mean difference	Std. error	value	95% confidence interval
						Lower bound	Upper bound
ROI: full FOV	R0	R1	0.00123	0.00319	0.981	−0.0070	0.0094
		R2	0.00834	0.00267	0.010	0.0015	0.0152
		R3	−0.00046	0.00265	0.998	−0.0073	0.0063
ROI: full FOV	R1	R2	0.00711	0.00358	0.195	−0.0021	0.0163
		R3	−0.00169	0.00356	0.965	−0.0109	0.0075
ROI: full FOV	R2	R3	−0.00879	0.00311	0.025	−0.0168	−0.0008
ROI:	R0	R1	−0.00324	0.00313	0.730	−0.0113	0.0048
		R2	0.00696	0.00263	0.040	0.0002	0.0137
		R3	0.00086	0.00260	0.987	−0.0058	0.0076
ROI:	R1	R2	0.01020	0.00352	0.020	0.0011	0.0193
		R3	0.00410	0.00350	0.646	−0.0049	0.0131
ROI:	R2	R3	−0.00610	0.00306	0.191	−0.0140	0.0018

The mean difference is significant at the 0.05 level.
One-way ANOVA test with null hypothesis that the means of distributions are equal.