survfit.object {survival4}R Documentation

Parametric Survival Model Object

Description

This class of objects is returned by the `survfit' class of functions to represent a fitted survival curve.

Objects of this class have methods for the functions `print', `summary', `plot', `points' and `lines'.

Arguments

time the time points at which the curve has a step.
n.risk the number of subjects at risk at t.
n.event the number of events that occur at time t.
surv the estimate of survival at time t+0. This may be a vector or a matrix.
strata if there are multiple curves, this component gives the number of elements of of the time etc. vectors corresponding to the first curve, the second curve, and so on. The names of the elements are labels for the curves.
std.err the standard error of the cumulative hazard or -log(survival).
uppper upper confidence limit for the survival curve.
lower lower confidence limit for the survival curve.
conf.type the approximation used to compute the confidence limits.
conf.int the level of the confident limits, e.g. 90 or 95%.
na.action the returned value from the na.action function, if any. It will be used in the printout of the curve, e.g., the number of observations deleted due to missing values.
call an image of the call that produced the object.

COMPONENTS

The following components must be included in a legitimate survfit object.

See Also

survfit, plot.survfit, summary.survfit.


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