R: Alias for the survfit function

basehaz {survival} | R Documentation

## Alias for the survfit function

### Description

Compute the predicted survival curve for a Cox model.

### Usage

    basehaz(fit, centered=TRUE)

### Arguments

`fit` | a coxph fit
`centered` | if TRUE return data from a predicted survival curve at the mean values of the covariates `fit$mean`, if FALSE return a prediction for all covariates equal to zero.

### Details

This function is simply an alias for `survfit`, which does the actual work and has a richer set of options. The alias exists only because some users look for predicted survival estimates under this name.

The function returns a data frame containing the `time`, `cumhaz` and optionally the strata (if the fitted Cox model used a strata statement), which are copied the `survfit` result. If there are factor variables in the model, then the default predictions at the "mean" are meaningless since they do not correspond to any possible subject; correct results require use of the `newdata` argument of survfit. Results for all covariates =0 are normally only of use as a building block for further calculations.

### Value

a data frame with variable names of `hazard`, `time` and optionally `strata`. The first is actually the cumulative hazard.

### See Also

`survfit.coxph`

[Package survival version 3.2-7 Index]