Table 3 Comparison of simulation results with β=[ ln(2) 0.5] ′ , 50% censoring, σ=0.2 , and validation fraction 0.25
From: Failure time regression with continuous informative auxiliary covariates
n =100 | n =200 | ||||
|---|---|---|---|---|---|
\({\hat {\beta }_{V}}\) | \({\hat {\beta }_{EPL}}\) | \({\hat {\beta }_{V}}\) | \({\hat {\beta }_{EPL}}\) | ||
m e a n−β 0 | -0.142 | 0.056 | -0.087 | 0.049 | |
0.107 | 0.018 | 0.056 | 0.001 | ||
m e d i a n−β 0 | -0.152 | 0.035 | -0.125 | 0.011 | |
0.091 | -0.002 | 0.065 | 0.002 | ||
se | 0.506 | 0.565 | 0.405 | 0.417 | |
0.329 | 0.320 | 0.234 | 0.232 | ||
\(mean(\hat {se})\) | 0.513 | 0.618 | 0.380 | 0.410 | |
0.306 | 0.333 | 0.220 | 0.224 | ||
cp | 0.944 | 0.936 | 0.928 | 0.924 | |
0.934 | 0.954 | 0.934 | 0.942 | ||