ARD Survival Differences

Calculate differences in the Kaplan-Meier estimator of survival using the results from survival::survfit().

Usage

ard_survival_survfit_diff(x, times, conf.level = 0.95)

Arguments

x

(survift)
object of class 'survfit' typically created with survival::survfit()

times

(numeric)
a vector of times for which to return survival probabilities.

conf.level

(scalar numeric)
confidence level for confidence interval. Default is 0.95.

Value

an ARD data frame of class 'card'

Examples

library(ggsurvfit)
library(survival)

survfit(Surv_CNSR() ~ TRTA, data = cards::ADTTE) |>
  ard_survival_survfit_diff(times = c(25, 50))
#> {cards} data frame: 32 x 11
#>    group1 group1_level variable variable_level       stat_name stat_label
#> 1    TRTA    Xanomeli…     time             25 reference_level  referenc…
#> 2    TRTA    Xanomeli…     time             25          method     method
#> 3    TRTA    Xanomeli…     time             25        estimate  Survival…
#> 4    TRTA    Xanomeli…     time             25       std.error  Survival…
#> 5    TRTA    Xanomeli…     time             25       statistic  z statis…
#> 6    TRTA    Xanomeli…     time             25        conf.low  CI Lower…
#> 7    TRTA    Xanomeli…     time             25       conf.high  CI Upper…
#> 8    TRTA    Xanomeli…     time             25         p.value    p-value
#> 9    TRTA    Xanomeli…     time             50 reference_level  referenc…
#> 10   TRTA    Xanomeli…     time             50          method     method
#>         stat
#> 1    Placebo
#> 2  Survival…
#> 3      0.293
#> 4      0.067
#> 5      4.392
#> 6      0.162
#> 7      0.424
#> 8          0
#> 9    Placebo
#> 10 Survival…
#> ℹ 22 more rows
#> ℹ Use `print(n = ...)` to see more rows
#> ℹ 4 more variables: context, fmt_fn, warning, error