Add event N

For each survfit() object summarized with tbl_survfit() this function will add the total number of events observed in a new column.

Usage

# S3 method for class 'tbl_survfit'
add_nevent(x, ...)

Arguments

x

object of class 'tbl_survfit'

...

Not used

See also

Other tbl_survfit tools: add_p.tbl_survfit()

Examples

library(survival)
fit1 <- survfit(Surv(ttdeath, death) ~ 1, trial)
fit2 <- survfit(Surv(ttdeath, death) ~ trt, trial)

# Example 1 ----------------------------------
list(fit1, fit2) |>
  tbl_survfit(times = c(12, 24)) |>
  add_n() |>
  add_nevent()


  
Characteristic
      
N
      
Event N
      
Time 12
      
Time 24
    
Overall
200
112
89% (84%, 93%)
44% (38%, 51%)
Chemotherapy Treatment
200
112



    Drug A




91% (85%, 97%)
47% (38%, 58%)
    Drug B




86% (80%, 93%)
41% (33%, 52%)