Table 2.

Agreement analysis between Color and IR images based on summary retinal vessel calibre

Parameter	Mean Difference	LOA	p value *	p value**	κ ***
CRAE	8.6	87.2 to −70.0	0.29	0.37	0.10
CRVE	44.7	242.1 to −152.8	0.05	0.42	−0.01

*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