time
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for right censored data, this is the follow up time. For interval data, the
first argument is the starting time for the interval.
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event
|
The status indicator, normally 0=alive, 1=dead. Other choices are T/F
(TRUE = death) or 1/2 (2=death).
For interval censored data, the status indicator is 0=right censored,
1= event at time , 2=left censored, 3=interval censored.
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time2
|
For interval censored or counting process data only, the ending time of the interval.
Intervals are
assummed to be open on the left and closed on the right, (start, end].
For counting process data,
event marks whether an event occured at the end of the interval.
|
type
|
one of left, right, counting, interval, or interval2.
If this is not specified, the
default is either right or counting, depending on whether the time2
argument is absent or present, respectively.
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origin
|
for counting process data, the hazard function origin. This is most often
used in conjunction with a model containing time dependent strata in order
to align the subjects properly when they cross over from one strata to
another.
|