Is it possible to transpose tbl_summary table (Pivot table) - gtsummary

Question

I would want to create a pivot table using the dataframe using tbl_summary
head(tblbdcc)
# A tibble: 6 x 11
ntdcc miphlycc anopmcrpcc anomcrtcc cleftscc impanuscc hypcc talipcc limbcc omphcc gascc
<fct> <fct> <dbl+lbl> <fct> <fct> <fct> <fct> <fct> <fct> <fct> <fct>
1 Cases NA NA NA NA NA NA NA NA NA NA
2 NA Cases NA NA NA NA NA NA NA NA NA
3 Controls NA NA NA NA NA NA NA NA NA NA
4 Controls NA NA NA NA NA NA NA NA NA NA
5 Controls NA NA NA NA NA NA NA NA NA NA
6 NA NA NA NA NA NA Cases NA NA NA NA
tblbdscc <- tblbdcc %>%
tbl_summary(
missing = "no",
statistic = all_categorical() ~ "{n}"
)
I would want to transform the table from
to

Answer 1

There is no pivot table in gtsummary, but you can construct the table one row at a time and stack the resulting tables. Example below.
library(gtsummary)
library(tidyverse)
#> Warning: package 'readr' was built under R version 4.1.2
packageVersion("gtsummary")
#> [1] '1.5.0'
set.seed(11234)
# simulate data
df <-
tibble(
ntdcc = sample(c("Case", "Control", NA), 20, replace = TRUE),
gascc = sample(c("Case", "Control", NA), 20, replace = TRUE),
limbcc = sample(c("Case", "Control", NA), 20, replace = TRUE)
)
# loop over every column in df to construct table
tbl <-
names(df) %>%
map(
# build summary table for single category
~ df %>%
select(all_of(.x)) %>%
mutate(..true.. = TRUE) %>%
filter(complete.cases(.)) %>%
tbl_summary(
by = all_of(.x),
missing = "no",
statistic = ~"{n}",
label = list(..true.. = .x)
) %>%
# update column headers
modify_header(
all_stat_cols() ~ "**{level}**",
label = "**Category Assigned**"
)
) %>%
# stack all tbls together
tbl_stack() %>%
# remove all footnotes
modify_footnote(all_stat_cols() ~ NA)
Created on 2022-01-19 by the reprex package (v2.0.1)