Estimate survival curves using the Kaplan-Meier method.
Estimate the (grouped or smoothed) instantaneous mortality or hazard rate. Compare two or more survival curves using a log-rank or related test. Fit appropriate Cox regression models to continuous time data from epidemiologic cohort studies using any statistical package and evaluate the fit of these models. Use time-dependent covariates in the Cox model and interpret the coefficients. Fit appropriate Poisson regression models to grouped data from epidemiologic studies and evaluate the fit of these models.