How change labels name in risk table using ggsurvfit package?

Question

Is it possible to edit the risk table labels?

I'm trying to change the risk table labels ('male', 'female') to something else.

library(tidyverse)
library(ggsurvfit)

p <- 
  survfit2(Surv(time, status) ~ sex, data = df_lung) %>%
  ggsurvfit(linewidth = 1) + 
  scale_ggsurvfit() + 
  add_risktable(
    risktable_stats = c("n.risk")) +
  theme_classic() +
  scale_color_manual(values = c('blue', 'magenta'),
                     labels = c('My label', 'My other label')) +
  scale_fill_manual(values = c('blue', 'magenta'),
                    labels = c('My label', 'My other label'))


p

If I use scale_color_manual and scale_fill_manual, the ggplot legend shows the changed labels but the table shows the output labels. How edyting risk table inside?

Answer 1

It's easiest to simply change the labels in the data frame before you call survfit2(). But you can also add any ggplot2() functions to the add_risktable(theme) argument. Examples of both below!

library(ggsurvfit)
#> Loading required package: ggplot2
library(tidyverse)
packageVersion("ggsurvfit")
#> [1] '1.0.0'

# it's easiest to change the label in the data before
p <- 
  survfit2(
    Surv(time, status) ~ sex, 
    data = df_lung |> mutate(sex = case_match(sex, "Male" ~ 'My label', "Female" ~ 'My other label'))
  ) %>%
  ggsurvfit(linewidth = 1) + 
  scale_ggsurvfit() + 
  add_risktable(
    risktable_stats = c("n.risk")
  ) +
  theme_classic() +
  scale_color_manual(values = c('blue', 'magenta')) +
  scale_fill_manual(values = c('blue', 'magenta'))
p

# you can also modify the labels directly using ggplot functions 
# in the theme argument of add_risktable()
p <- survfit2(Surv(time, status) ~ sex, data = df_lung) %>%
  ggsurvfit(linewidth = 1) + 
  scale_ggsurvfit() + 
  add_risktable(
    risktable_stats = c("n.risk"),
    theme = 
      list(
        theme_risktable_default(),
        scale_y_discrete(label = c('My other label', 'My label'))
      )
  ) +
  theme_classic() +
  scale_color_manual(values = c('blue', 'magenta'),
                     labels = c('My label', 'My other label')) +
  scale_fill_manual(values = c('blue', 'magenta'),
                    labels = c('My label', 'My other label'))
p

^{Created on 2024-01-15 with reprex v2.0.2}