Adding asterisk to row in tbl_summary table (R)

Here's an example adding an asterix and also adding a note via a proper footnote as well.

library(gtsummary)
table  
  tblsummary(
    by = trt,
    include = c(marker, age),
    missing = "no"
  ) |> 
  addn("{pmiss}", collabel = "% Missing")
create a vector of variable names with missing rate >5% (there are plenty of ways to get this and this is just one example)
variablesbigmissing  
  cards::unlistardcolumns() |> 
  dplyr::filter(statname == "pmiss", stat > 0.05) |> 
  dplyr::pull(variable)
tablefinal  
  # add a star for variables with missing rate larger than %5
  modifytablebody(
    ~ .x |> 
      dplyr::mutate(label = ifelse(variable %in% .env$variablesbigmissing & rowtype == "label", paste0(label, "*"), label))
  ) |> 
  # or you can do it via a proper footnote
  modifyfootnotebody(
    footnote = "Missing rate > 5%",
    columns = "label",
    rows = variable %in% .env$variablesbigmissing & row_type == "label"
  )

^{Created on 2026-06-07 with reprex v2.1.1}