如何对分类变量的级别进行字母数字排序以传递到 R 中的 gtsummary 表

Question

I want the levels of grade to be ordered as 1- 2- 10.
I know if inside case_when I use numbers (ie 1 instead of "1", ... ) this will solve the problem but in my actual case I have to keep the values as characters.
in gtsummary manual, it used sort attribute. I set it to alphanumeric but I still can not get what I want.
is there any other way to order the levels of an alphanumeric-ish variable?

library(gtsummary)
trial2 <- trial %>% 
    dplyr::select(trt, age, grade) %>%
mutate(grade = case_when(grade == "I" ~ "1",
                         grade == "II" ~ "10",
                         TRUE ~ "2"))

trial2 %>%
    tbl_summary(by = trt,
                sort = list(
                           grade ~ "alphanumeric")) %>%
    add_p() %>%
    modify_footnote(update = everything() ~ NA) %>%
     bold_labels()

Answer 1

can you factor the character variable to get the order you want like so:

library(gtsummary)
library(dplyr)

trial2 <- trial %>% 
  dplyr::select(trt, age, grade) %>%
  mutate(grade = case_when(grade == "I" ~ "1",
                           grade == "II" ~ "10",
                           TRUE ~ "2"),
         grade = factor(grade, levels = c("1","2","10")))

trial2 %>%
  tbl_summary(by = trt) %>%
  add_p() %>%
  modify_footnote(update = everything() ~ NA) %>%
  bold_labels()