Summary statistic of receiver operating characteristic curve; probability test correctly ranks random positive versus negative
Expansion
Area Under Curve
Purpose
Quantifies diagnostic accuracy across all thresholds
Clinical Context
Area under curve equals probability test correctly identifies positive versus negative. Ranges 0 to 1. Area under curve 0.5 equals random guessing, 1.0 equals perfect.
Related Terms
- Receiver operating characteristic
- Sensitivity
Key Points
- Area under curve greater than 0.9 excellent diagnostic accuracy; less than 0.7 poor discriminatory ability