| visits_to_mstate {oncomsm} | R Documentation |
Convert cross-sectional visit data to multi-state format
Description
visits_to_mstate() converts visits to interval-censored multi-state
data where each row corresponds to a transition between states.
The conversion assumes that visit spacing is tight enough to not miss any
transitions.
Usage
visits_to_mstate(tbl_visits, model, now = max(tbl_visits$t))
Arguments
tbl_visits |
data frame, visit data in long format |
model |
an object of class srpmodel containing prior information |
now |
time point since start of trial (might be later than last recorded visit) |
Value
A data frame with multi-state data; variables are
subject_id<chr>, group_id<chr>, subject_id<chr>, from<chr>,
to<chr>, t_min<dbl>, t_max<dbl>, t_sot<dbl>, where
to and from indicate the state from which and into which the transitions
occurs, t_max and t_min specify the
interval in which the transition occurred relative to t_sot
(start of treatment).
Examples
mdl <- create_srpmodel(A = define_srp_prior())
tbl_visits <- sample_predictive(mdl, n_per_group = 5L, nsim = 1, seed = 468L)
visits_to_mstate(tbl_visits, mdl)