. Author manuscript; available in PMC: 2020 Dec 1.

Published in final edited form as: Am J Ophthalmol. 2019 Jul 16;208:111–123. doi: 10.1016/j.ajo.2019.07.003

TABLE 4.

Intra-class correlation for quantitative metrics used to describe flow deficits (FDs) calculated from the fuzzy C-means (FCM) method and the Phansalkar method using various radius options in 6×6 mm scans of eyes with drusen.

Drusen	The FCM method	The Phansalkar method
Drusen	The FCM method	2-pixel radius	4-pixel radius	10-pixel radius	15-pixel radius	25-pixel radius
FDD	0.8045	0.5697	0.6647	0.7630	0.7848	0.7448
MFDS	0.9152	0.7943	0.7153	0.6910	0.7517	0.7319
FDN	0.8786	0.5684	0.7076	0.7819	0.7740	0.7165
ICD	0.9115	0.7000	0.6872	0.6727	0.7658	0.7382
FDA	0.8703	0.5605	0.6415	0.7399	0.7652	0.7171

Abbreviations: FCM, Fuzzy C-means; FD, Flow deficit; FDD, FD density; FDN, FD number; MFDS, mean FD size; ICD, inter-capillary distance; FDA, total FD area.