Design and analysis of two-phase studies with binary outcome applied to Wilms tumour prognosis

N. E. Breslow, N. Chatterjee

Research output: Contribution to journalArticlepeer-review

129 Scopus citations


Two-phase stratified sampling is used to select subjects for the collection of additional data, e.g. validation data in measurement error problems. Stratification jointly by outcome and covariates, with sampling fractions chosen to achieve approximately equal numbers per stratum at the second phase of sampling, enhances efficiency compared with stratification based on the outcome or covariates alone. Nonparametric maximum likelihood may result in substantially more efficient estimates of logistic regression coefficients than weighted or pseudolikelihood procedures. Software to implement all three procedures is available. We demonstrate the practical importance of these design and analysis principles by an analysis of, and simulations based on, data from the US National Wilms Tumor Study.

Original languageEnglish (US)
Pages (from-to)457-468
Number of pages12
JournalJournal of the Royal Statistical Society. Series C: Applied Statistics
Issue number4
StatePublished - 1999
Externally publishedYes


  • Design efficiency
  • Logistic regression
  • Nonparametric maximum likelihood
  • Stratified sampling

ASJC Scopus subject areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty


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