survival (version 2.37-4)

basehaz: Compute the baseline survival curve for a Cox model

Description

Compute the baseline survival curve for a Cox model.

Usage

basehaz(fit, centered = TRUE)

Arguments

fit

The result of a coxph fit.

centered

If TRUE, the resultant curve is for a hypothetical subject whose covariate values are the corresponding means from the original data, otherwise for a hypothetical subject with a mean vector of zero.

Value

• a data frame with components
• time
  The sorted vector of unique time points (those at which an event occurred
• hazard
  The baseline hazard function
• strata
  If fit was a stratified Cox model, the strata. There will be one survival curve per strata.

Details

This function exists primarily because users will look for the phrase 'baseline hazard' (often SAS converts looking for familiar keywords.) The primary function for creating a survival curve is survfit, which this calls. See that manual page for more options, including confidence limits and the ability to use other covariate vectors. The result of survfit also has print, plot and summary methods that make it far more useful.

See Also

survfit