Summarize continuous variable

Summarize a continuous variable by one or more categorical variables

tbl_continuous(
  data,
  variable,
  include = everything(),
  digits = NULL,
  by = NULL,
  statistic = everything() ~ "{median} ({p25}, {p75})",
  label = NULL,
  value = NULL
)

Arguments

data

(data.frame)
A data frame.

variable

(tidy-select)
A single column from data. Variable name of the continuous column to be summarized.

include

(tidy-select)
Variables to include in the summary table. Default is everything().

digits

(formula-list-selector)
Specifies how summary statistics are rounded. Values may be either integer(s) or function(s). If not specified, default formatting is assigned via assign_summary_digits(). See below for details.

by

(tidy-select)
A single column from data. Summary statistics will be stratified by this variable. Default is NULL.

statistic

(formula-list-selector)
Specifies summary statistics to display for each variable. The default is everything() ~ "{median} ({p25}, {p75})".

label

(formula-list-selector)
Used to override default labels in summary table, e.g. list(age = "Age, years"). The default for each variable is the column label attribute, attr(., 'label'). If no label has been set, the column name is used.

value

(formula-list-selector)
Supply a value to display a variable on a single row, printing the results for the variable associated with the value (similar to a 'dichotomous' display in tbl_summary()).

Value

a gtsummary table

Examples

# Example 1 ----------------------------------
tbl_continuous(
  data = trial,
  variable = age,
  by = trt,
  include = grade
)


  
Characteristic
      
Drug A

N = 981
      
Drug B

N = 1021
    
Grade



    I
46 (36, 60)
48 (42, 55)
    II
45 (31, 55)
51 (42, 58)
    III
52 (42, 61)
45 (36, 52)
1 Age: Median (Q1, Q3)
    

# Example 2 ----------------------------------
trial |>
  dplyr::mutate(all_subjects = 1) |>
  tbl_continuous(
    variable = age,
    statistic = ~"{mean} ({sd})",
    by = trt,
    include = c(all_subjects, stage, grade),
    value = all_subjects ~ 1,
    label = list(all_subjects = "All Subjects")
  )


  
Characteristic
      
Drug A

N = 981
      
Drug B

N = 1021
    
All Subjects
47 (15)
47 (14)
T Stage



    T1
44 (15)
50 (14)
    T2
50 (13)
46 (12)
    T3
49 (14)
50 (15)
    T4
45 (17)
44 (15)
Grade



    I
46 (16)
46 (15)
    II
45 (15)
50 (12)
    III
51 (13)
46 (15)
1 Age: Mean (SD)