Zone Specific Fractal Dimension of Retinal Images as Predictor of Stroke Incidence

Table 3

Kruskal-Wallis and Mann-Whitney zone based FDC significance test.

	Zone based analysis
Method	Control ()			Case ()			95% CI; for		value; versus ()
	Median ()	Average rank		Median ()	Average rank
FDCA	1.976	47.7	1.61	1.973	39.0	−1.61	−0.0073, 0.0009	2.60	0.107
FDCB	1.994	50.0	2.40	1.989	37.1	−2.40	−0.0079, −0.0008	5.75	0.016
FDCC	1.994	48.4	1.85	1.988	38.4	−1.85	−0.0118, 0.0003	3.43	0.064
FDCAB	1.983	49.5	2.25	1.981	37.5	−2.25	−0.0074, −0.0005	5.06	0.025
FDCAC	1.984	48.6	1.91	1.981	38.3	−1.91	−0.0090, 0.0000	3.66	0.056
FDCBC	1.993	49.3	2.15	1.988	37.7	−2.15	−0.0101, −0.0006	4.63	0.031

; test statistic from Kruskal-Wallis analysis; 95% CI from the Mann-Whitney test.