AUC
Area Under the Curve. The AUC is the area under a receiver operating characteristic curve (ROC) which is a plot of true positive (sensitivity) against the false positive rate (100-specificity). The AUC measures how well a parameter can distinguish between disease and normal. An AUC of 0.5 represents essentially a 50/50 chance that a screening test can predict disease. 0.6 represents a 60% chance and is still a weak predictor. 0.7 is better with AUCs of 0.8 and 0.9 representing tests with good discriminatory ability.
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