Agreement study between color and IR retinal images based on retinal vasculature morphological parameters

BMC Ophthalmology

Table 1 Agreement analysis between the two sets of segmented Color and IR images based on obtained retinal vascular parameters

	Parameter	Mean Difference	LOA	p value *	p value**	κ ***
Ground Truth Set 1	FD	−0.003	0.053 to − 0.058	0.63	0.88	0.59
	VBR (%)	0.001	0.030 to −0.029	0.79	0.90	0.42
	ABA	1.2	13.3 to −10.9	0.34	0.73	0.28
	TAC	− 5.1	17.7 to −27.9	0.05	0.14	0.05
	ST	−0.005	0.023 to −0.033	0.10	0.80	0.20
Ground Truth Set 2	FD	0.00	0.060 to −0.059	0.96	0.28	0.25
	VBR (%)	0.00	0.027 to −0.027	0.97	0.64	0.29
	ABA	1.50	15.0 to −12.1	0.31	0.11	0.22
	TAC	0.90	22.0 to −20.3	0.68	0.78	0.04
	ST	0.003	0.079 to −0.073	0.69	0.13	0.25

*p-value of one sample t-tests (comparing between mean difference and zero value) to indicate presence of systemic bias
**p-value of Regression Analysis to indicate presence of proportional bias
***κ Cohen’s kappa value to indicate the level of agreement color and IR images

ISSN: 1471-2415