Survival Analysis for Cohorts with Missing Covariate Information CRAN Task View: Survival (http://CRAN.R-project.org/view=Survival) Estimate hazard ratios, survival curves and attributable risks for cohorts with missing covariates, using Cox models or Kaplan-Meier estimated for strata. This handles studies nested within cohorts, such as case-cohort studies with stratified sampling. See http://www.r-project.org/doc/Rnews/Rnews_2008-1.pdf Software Depends: R (>= 2.8.1), survival, MASS Hormuzd A. Katki <katkih@mail.nih.gov> Hormuzd A. Katki <katkih@mail.nih.gov> Unlimited 2009-10-16 application/tgz http://CRAN.R-project.org/package=NestedCohort