summary.survfit {survival4}R Documentation

Print a Survival Curve

Usage

summary.survfit(fit, times, censored=F, scale=1)

Arguments

fit output from a call to survfit.
times vector of the times; the returned matrix will contain 1 row for each time. This must be in increasing order and missing values are not allowed. If censored=T, the default time vector contains all the unique times in fit.list, otherwise the default time vector uses only the event (death) times.
censored logical flag: should the censoring times be included in the output? This is ignored if the times argument is present.
scale rescale the survival time, e.g., if the input data to survfit were in days, "scale=365" would scale the printout to years.
time the timepoint on the curve.
surv the value of the survival curve at time t+0.
n.risk the number of subjects at risk at time t-0 (but see the comments on weights in the survfit help file).
n.event if the times argument is missing, then this column is the number of events that occurred at time t. Otherwise, it is the cumulative number of events that have occurred since the last time listed until time t+0.
std.dev the standard deviation of the survival value.
lower lower confidence limits for the curve.
upper upper confidence limits for the curve.
strata the number of points per curve. If there are multiple curves in this result, then the time, surv, etc vectors will contain multiple curves, pasted end to end, and length(surv)=sum(strata). The names of the strata vector are the labels for the curves.
call the statement used to create the fit object.
na.action passed through from fit, if present.

Value

a list with the following components

See Also

survfit, 'print.summary.survfit.

Examples

data(ovarian)
summary( survfit( futime, fustat))


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