From: The impact of sample storage time on estimates of association in biomarker discovery studies
uncorrelated | correlated(ρ= 0.5) | |||
---|---|---|---|---|
n= 250 | n= 500 | n= 250 | n= 500 | |
t = 0 | ||||
| 0.305 | 0.302 | 0.303 | 0.298 |
se.emp | 0.091 | 0.064 | 0.128 | 0.093 |
rel.bias | 0.018 | 0.005 | 0.009 | -0.005 |
rel.bias.sd | 0.304 | 0.213 | 0.426 | 0.309 |
power† | 0.522 | 0.92 | 0.541 | 0.908 |
t = 5 | ||||
| 0.285 | 0.281 | 0.282 | 0.278 |
se.emp | 0.085 | 0.059 | 0.119 | 0.086 |
rel.bias | -0.052 | -0.064 | -0.058 | -0.072 |
rel.bias.sd | 0.282 | 0.198 | 0.398 | 0.287 |
power | 0.527 | 0.926 | 0.546 | 0.908 |
t = 10 | ||||
| 0.266 | 0.263 | 0.264 | 0.261 |
se.emp | 0.08 | 0.055 | 0.112 | 0.08 |
rel.bias | -0.114 | -0.124 | -0.121 | -0.13 |
rel.bias.sd | 0.266 | 0.185 | 0.372 | 0.268 |
power | 0.532 | 0.929 | 0.55 | 0.91 |