From: A modified Wald interval for the area under the ROC curve (AUC) in diagnostic case-control studies
Factor | Variation | Results in paragraph |
---|---|---|
True AUC (AUC 0) | 0.7,0.8,0.9 (each ±0.01) | |
Sample size (n) | 40,100,200 | |
Case-control ratio | 1:1 | Interval length, coverage probability |
Measurement scale | Continuous | |
Variance of the cases (σ 1), σ 0 = 1 | 1 | |
Case-control ratio | 1:2, 1:9 | |
Measurement scale | Ordinal with five categories | Robustness evaluation |
Variance of the cases (σ 1), σ 0 = 1 | 0.5,2,3 | |
AUC under the alternative hypothesis (AUC 1) | 0.700,0.701,…,0.85; | Statistical power |
0.800,0.801,…,0.99 |