Table 3.
Finite sample performance of the proposed CNA based estimators of accuracy for dependent censoring with 1 matched control under the - and -sampling. Shown below are the sample mean (Mean), standard error (SSE), average of the estimated standard error (ASE) and empirical coverage level of the 95% confidence intervals (CovP), multiplied by 100, for the proposed point and interval estimators.
(a) Accuracy Estimates at , for k = 1, 2,3,4. | |||||||||
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Truth | Bias | Bias | SSE | SSE | ASE | ASE | CovP | CovP | |
FPRt0(c.2) | 79.0 | 0.0 | 0.0 | 1.4 | 1.3 | 1.4 | 1.4 | 94.8 | 94.7 |
FPRt0(c.4) | 58.2 | 0.1 | 0.0 | 1.6 | 1.5 | 1.6 | 1.6 | 94.7 | 95.7 |
FPRt0(c.6) | 37.7 | 0.1 | 0.0 | 1.5 | 1.5 | 1.4 | 1.4 | 92.8 | 94.7 |
FPRt0(c.8) | 17.8 | 0.1 | 0.1 | 1.1 | 1.1 | 1.1 | 1.1 | 94.0 | 95.2 |
| |||||||||
TPRt0(c.2) | 97.1 | −0.1 | −0.1 | 1.0 | 1.0 | 1.0 | 1.0 | 94.3 | 94.5 |
TPRt0(c.4) | 90.4 | −0.3 | −0.3 | 1.7 | 1.8 | 1.8 | 1.8 | 95.8 | 95.5 |
TPRt0(c.6) | 78.5 | −0.5 | −0.5 | 2.5 | 2.5 | 2.5 | 2.5 | 95.1 | 95.1 |
TPRt0(c.8) | 57.3 | −0.6 | −0.6 | 2.9 | 2.9 | 3.0 | 3.0 | 95.6 | 95.5 |
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NPVt0(c.2) | 99.2 | 0.0 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | 93.0 | 92.7 |
NPVt0(c.4) | 98.6 | 0.0 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | 94.9 | 94.9 |
NPVt0(c.6) | 98.0 | 0.0 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | 95.1 | 94.5 |
NPVt0(c.8) | 97.0 | 0.0 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | 95.2 | 94.9 |
| |||||||||
PPVt0(c.2) | 6.9 | −0.1 | −0.1 | 0.4 | 0.4 | 0.4 | 0.4 | 94.1 | 93.1 |
PPVt0(c.4) | 8.5 | −0.2 | −0.2 | 0.5 | 0.5 | 0.5 | 0.5 | 93.1 | 93.3 |
PPVt0(c.6) | 11.1 | −0.3 | −0.2 | 0.8 | 0.8 | 0.8 | 0.8 | 92.4 | 93.4 |
PPVt0(c.8) | 16.2 | −0.4 | −0.4 | 1.3 | 1.3 | 1.3 | 1.3 | 94.1 | 94.6 |
(b) AUC and Accuracy Estimates at TPR of 0.90. | |||||||||
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| |||||||||
Truth | Bias | Bias | SSE | SSE | ASE | ASE | CovP | CovP | |
AUC | 78.5 | −0.7 | −0.7 | 1.5 | 1.5 | 1.5 | 1.5 | 93.0 | 92.0 |
FPRTPR=0.9 | 57.2 | 0.6 | 0.6 | 4.1 | 4.2 | 4.5 | 4.5 | 96.2 | 95.9 |
NPVTPR=0.9 | 98.6 | 0.0 | 0.0 | 0.2 | 0.2 | 0.2 | 0.2 | 94.8 | 93.5 |
PPVTPR=0.9 | 8.6 | −0.2 | −0.2 | 0.8 | 0.8 | 0.8 | 0.8 | 93.9 | 93.8 |