Table 1.

Mean area comparison of algorithm and manually defined geographic atrophy regions of the eight-fold cross-validation.

Mean area (${\mathrm{mm}}^2$) (algorithm)	Mean area (${\mathrm{mm}}^2$) (manual)	Mean correlation of area	Mean area difference (${\mathrm{mm}}^2$)a	Absolute mean area difference (${\mathrm{mm}}^2$)	Percentage of mean area differenceb	Percentage of absolute mean area differenceb
$7.24\pm 0.67$	$6.84\pm 0.98$	$0.98\pm 0.02$	$0.40\pm 0.33$	$0.94\pm 0.55$	$0.11\pm 0.08$	$0.18\pm 0.08$
Overlap ratio	Accuracy	True positive rate		Specificity	Positive predictive value	False discovery rate
$0.72\pm 0.03$	$0.94\pm 0.00$	$0.87\pm 0.01$		$0.96\pm 0.01$	$0.80\pm 0.04$	$0.20\pm 0.04$

^aPositive value implies that the mean algorithm-defined area is greater than that from the manual delineation.

^bPercentage value is defined as the corresponding mean area difference over the area of manual delineation.