summary.survfit {survival} | R Documentation |
Returns a list containing the survival curve, confidence limits for the curve, and other information.
## S3 method for class 'survfit': summary(object, times=, censored=FALSE, scale=1, extend=FALSE, rmean=getOption('survfit.rmean'), ...)
object |
the result of a call to the survfit function.
|
times |
vector of 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 times vector contains all
the unique times in fit , otherwise
the default times vector uses only the event (death) times.
|
censored |
logical value: should the censoring times be included in the output?
This is ignored if the times argument is present.
|
scale |
numeric value to rescale the survival time, e.g., if the input data to
survfit were in
days, scale = 365.25 would scale the output to years.
|
extend |
logical value: if TRUE, prints information for all specified times ,
even if there are no subjects left at the end of the specified
times .
This is only valid if the times argument is present.
|
rmean |
Show restricted mean: see
print.summary.survfit for details |
... |
for future methods |
a list with the following components:
surv |
the estimate of survival at time t+0. |
time |
the timepoints on the curve. |
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.
|
n.entered |
This is present only for counting process survival data.
If the times argument is
missing, this column is the number of subjects that entered at time t.
Otherwise, it is the cumulative number of subjects that have entered
since the last time listed until time t.
|
n.exit.censored |
if the times argument is
missing, this column is the number of subjects that left without an
event at time t.
Otherwise, it is the cumulative number of subjects that have left
without an event
since the last time listed until time t+0.
This is only present for counting process survival data.
|
std.err |
the standard error of the survival value. |
conf.int |
level of confidence for the confidence intervals of survival. |
lower |
lower confidence limits for the curve. |
upper |
upper confidence limits for the curve. |
strata |
indicates stratification of curve estimation.
If strata is not NULL ,
there are multiple curves in the result and the surv , time , n.risk , etc.
vectors will contain multiple curves, pasted end to end.
The levels of strata (a factor) are the labels for the curves.
|
call |
the statement used to create the fit object.
|
na.action |
same as for fit , if present.
|
table |
table of information that is returned from print.survfit function.
|
type |
type of data censoring. Passed through from the fit object. |
survfit
, print.summary.survfit
summary( survfit( Surv(futime, fustat)~1, data=ovarian)) summary( survfit( Surv(futime, fustat)~rx, data=ovarian))