Partial likelihood ratio tests for the Cox model under complex sampling

Stat Med. 2013 Jan 15;32(1):110-23. doi: 10.1002/sim.5492. Epub 2012 Jul 17.


We develop an analog of the likelihood ratio test for Cox proportional hazards models fitted to sample survey data. We look at methods for computing the asymptotic distribution and at ways of improving the small-sample performance. The methods are illustrated with examples using data from the National Health and Nutrition Examination Survey and from a stratified case-cohort study.

MeSH terms

  • Child, Preschool
  • Cohort Studies
  • Computer Simulation
  • Humans
  • Kidney Neoplasms / pathology
  • Likelihood Functions*
  • Nutrition Surveys
  • Proportional Hazards Models*
  • Sample Size
  • Survival Analysis*
  • Wilms Tumor / pathology