Question

Is it possible to add more than one add_n ? The following code returns the following warning and neither add_n is added. On their own both work.

. Column "n" not found and was ignored.

iris %>%
gtsummary::tbl_summary(type = list(where(is.logical) ~ "categorical"),
                       missing_text = 'Missing',
                       missing = 'ifany') %>%
gtsummary::add_n(statistic = "{N_nonmiss}", col_label = "**N responses**") %>%
gtsummary::add_n(statistic = "{N_miss}", col_label = "**Missing**")

Answer 1

You can make two table one with the response N and statistics and then one table with the missing N and use tbl_merge() to combine them.

library(gtsummary)
library(dplyr)
t1 <- iris %>%
  gtsummary::tbl_summary(type = list(where(is.logical) ~ "categorical"),
                         missing_text = 'Missing',
                         missing = 'ifany') %>%
  gtsummary::add_n(statistic = "{N_nonmiss}", 
                   col_label = "**N responses**")

t2 <- iris %>%
  gtsummary::tbl_summary(type = list(where(is.logical) ~ "categorical"),
                         missing_text = 'Missing',
                         missing = 'ifany') %>%
  gtsummary::add_n(statistic = "{N_miss}", col_label = "**Missing**") %>% 
  gtsummary::modify_column_hide(stat_0)

gtsummary::tbl_merge(list(t1,t2), tab_spanner = FALSE)