tte: Time-to-event data

In raredd/rawr: rawr miscellaneous

Time-to-event data

Description

Calculate time-to-event and competing risks times and event indicators.

Usage

tte(start, fwup, ..., crisk = FALSE, fix = TRUE, censor = Inf, factor = 1)

Arguments

start, fwup	start and last follow-up date vectors
...	one or more event date vectors; note that event dates occurring before start are removed
crisk	logical; if TRUE, event dates are treated as competing events and the order of dates in ... matters, i.e., the first date takes precedence, and indicators are assigned in order of event date vectors
fix	logical; if TRUE (default); censor negative times at 0 and censor the event
censor	max time after which events/times are censored
factor	time factor to convert days (default) to months (e.g, use 30.437), years (365.242), etc.

Examples

dd <- data.frame(
  start = 0,
  end = 10,
  death = c(5, 2, NA, 2, NA),
  prog = c(3, 2, NA, 3, 5),
  trt = c(4, 1, NA, NA, 8)
)
dd[] <- lapply(dd, as.Date, origin = '2000-01-01')

tte(dd$start, dd$end, dd$death)
tte(dd$start, dd$end, dd$death, dd$prog)
tte(dd$start, dd$end, dd$death, dd$prog, crisk = TRUE)
tte(dd$start, dd$end, dd$death, dd$prog, dd$trt, crisk = TRUE)

raredd/rawr documentation built on Feb. 25, 2025, 1:48 p.m.