Table 4. Sensitivity and specificity metrics for each of the Receiver Operating Characteristic curves.

	Sensitivity (%)	Specificity (%)	AUC	Optimal cut-off	p-value
Dim Mean CV	92.86	75	0.85 (.09)	2.26	.002
Dim Max CV	92.31	66.67	0.79 (.10)	4.11	.015
Bright Mean CV	100	66.67	0.87 (.08)	2.45	.002
Bright Max CV	69.23	91.67	0.85 (.08)	4.93	.003

Optimal cut-off scores and associated sensitivity/specificity calculated using a pre-test probability of 50%, and a cost-ratio of 1. Error for AUC values denoted as standard error.