format
A data frame containing a sequence of observed or censored transitions
to the next stage of severity or death. It is grouped by patient and
includes histories of 204 patients. All patients start in state 1 (no
BOS) at six months after transplant, and may subsequently develop BOS
or die.
bosms3 contains the data for a three-state model: no BOS, BOS
or death. bosms4 uses a four-state representation: no BOS,
mild BOS, moderate/severe BOS or death.
rll{
id (numeric) Patient identification number
from (numeric) Observed starting state of the transition
to (numeric) Observed or potential ending state of the transition
Tstart (numeric) Time at the start of the interval
Tstop (numeric) Time at the end of the interval
time (numeric) Time difference Tstart-Tstop
status (numeric) 1 if the transition to state
to was observed, or 0 if the transition to state to
was censored (for example, if the patient was observed
to move to a competing state)
trans (factor) Number of the transition from-to in
the set of all ntrans allowed transitions,
numbered from 1 to ntrans.
}source
Papworth Hospital, U.K.