censoringCharacter: censor using left, right,
interval or interval2
scaleCharacter: rescale the survival time to days,
weeks, months or years
formulaStrCharacter: formula to use
coxphBoolean: fit a Cox proportional hazards regression model?
survTimesurvTime object: times to follow up, time start, time
stop and event (optional)
clinicalData frame: clinical data
eventCharacter: name of column containing time of the event of
interest
timeStartCharacter: name of column containing starting time of the
interval or follow up time
timeStopCharacter: name of column containing ending time of the
interval (only relevant for interval censoring)
groupCharacter: group relative to each subject
followupCharacter: name of column containing follow up time