Two-phase outcome-dependent studies for failure times and testing for effects of expensive covariates.

@article{Lawless2018TwophaseOS,
  title={Two-phase outcome-dependent studies for failure times and testing for effects of expensive covariates.},
  author={Jerald F. Lawless},
  journal={Lifetime data analysis},
  year={2018},
  volume={24 1},
  pages={28-44}
}
Two- or multi-phase study designs are often used in settings involving failure times. In most studies, whether or not certain covariates are measured on an individual depends on their failure time and status. For example, when failures are rare, case-cohort or case-control designs are used to increase the number of failures relative to a random sample of the same size. Another scenario is where certain covariates are expensive to measure, so they are obtained only for selected individuals in a… CONTINUE READING
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