gtsummary (version 1.6.1)

add_p.tbl_survfit: Adds p-value to survfit table

Description

maturing Calculate and add a p-value

Usage

# S3 method for tbl_survfit
add_p(
  x,
  test = "logrank",
  test.args = NULL,
  pvalue_fun = style_pvalue,
  include = everything(),
  quiet = NULL,
  ...
)

test argument

The most common way to specify test= is by using a single string indicating the test name. However, if you need to specify different tests within the same table, the input in flexible using the list notation common throughout the gtsummary package. For example, the following code would call the log-rank test, and a second test of the G-rho family.

... %>%
  add_p(test = list(trt ~ "logrank", grade ~ "survdiff"),
        test.args = grade ~ list(rho = 0.5))

Example Output

Example 1

Example 2

See Also

Other tbl_survfit tools: add_n.tbl_survfit(), add_nevent.tbl_survfit(), modify, tbl_merge(), tbl_split(), tbl_stack(), tbl_strata(), tbl_survfit()

Examples

# NOT RUN {
library(survival)

gts_survfit <-
  list(
    survfit(Surv(ttdeath, death) ~ grade, trial),
    survfit(Surv(ttdeath, death) ~ trt, trial)
  ) %>%
  tbl_survfit(times = c(12, 24))

# Example 1 ----------------------------------
add_p_tbl_survfit_ex1 <-
  gts_survfit %>%
  add_p()

# Example 2 ----------------------------------
# Pass `rho=` argument to `survdiff()`
add_p_tbl_survfit_ex2 <-
  gts_survfit %>%
  add_p(test = "survdiff", test.args = list(rho = 0.5))
# }