Robert J. Gray

Professor of Biostatistics


Robert J. Gray
Department of Biostatistics and Computational Biology
Dana-Farber Cancer Institute
450 Brookline Ave
Boston, MA 02215


Course Material

  • Supplementary Inference Notes (pdf, about 1MB)
  • BIO 248cd Advanced Statistical Computing (2002)
  • BIO 250ab Probability II

  • (Not so) Recent Seminars

  • Conditional power and the logrank test Cancer Working Group, 11-9-00 (postscript, 4 slides to a page)
  • Sequential monitoring of clinical trials Cancer Working Group, 4-14-00 (postscript, 4 slides to a page)
  • Gap Time Seminar 11-12-99 Full size slides with color graphics (pdf)
  • Gap Time Seminar 11-12-99 Handout: Black and white slides suitable for printing (postscript, 4 slides to a page)

  • Technical Reports

  • 784Z Hazard estimation with covariates: algorithms for direct estimation, local scoring and backfitting (1994) (postscript)
  • 507Z A class of K sample tests for comparing the cumulative incidence of a competing risk (1986) (pdf scanned image)

  • Software

  • The cmprsk R package for cumulative incidence analysis with competing risks is available from CRAN
  • hazcov() (shar file) S functions for hazard estimation with covariates (Gray, JCGS, 1996) (very old and may not work with current systems
  • coxspline A gzipped tar file containing an R package source for flexible estimation and testing in Cox regression models.
  • desmon A gzipped tar file containing an R package source for local functions for design and monitoring of clinical trials.