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Number of Patients

Source: R/summarize_num_patients.R
summarize_num_patients.Rd

[Stable]

Count the number of unique and non-unique patients in a column (variable).

Usage 

s_num_patients(
  x,
  labelstr,
  .N_col,
  count_by = NULL,
  unique_count_suffix = TRUE
)

s_num_patients_content(
  df,
  labelstr = "",
  .N_col,
  .var,
  required = NULL,
  count_by = NULL,
  unique_count_suffix = TRUE
)

summarize_num_patients(
  lyt,
  var,
  .stats = NULL,
  .formats = NULL,
  .labels = c(unique = "Number of patients with at least one event", nonunique =
    "Number of events"),
  indent_mod = 0L,
  ...
)

analyze_num_patients(
  lyt,
  vars,
  .stats = NULL,
  .formats = NULL,
  .labels = c(unique = "Number of patients with at least one event", nonunique =
    "Number of events"),
  show_labels = c("default", "visible", "hidden"),
  indent_mod = 0L,
  ...
)

Arguments

x

(character or factor)
vector of patient IDs.

labelstr

(character)
label of the level of the parent split currently being summarized (must be present as second argument in Content Row Functions).

.N_col

(count)
row-wise N (row group count) for the group of observations being analyzed (i.e. with no column-based subsetting) that is passed by rtables.

count_by

(character or factor)
optional vector to be combined with x when counting nonunique records.

unique_count_suffix

(logical)
should "(n)" suffix be added to unique_count labels. Defaults to TRUE.

df

(data.frame)
data set containing all analysis variables.

.var, var

(string)
single variable name that is passed by rtables when requested by a statistics function.

required

(character or NULL)
optional name of a variable that is required to be non-missing.

lyt

(layout)
input layout where analyses will be added to.

.stats

(character)
statistics to select for the table.

.formats

(named character or list)
formats for the statistics.

.labels

(named character)
labels for the statistics (without indent).

indent_mod

(count)
it can be negative. Modifier for the default indent position for the structure created by this function(subtable, content table, or row) and all of that structure's children. Defaults to 0, which corresponds to the unmodified default behavior.

...

additional arguments for the lower level functions.

vars

(character)
variable names for the primary analysis variable to be iterated over.

show_labels

(string)
label visibility: one of "default", "visible" and "hidden".

Value

  • s_num_patients() returns a named list of 3 statistics:

    • unique: Vector of counts and percentages.

    • nonunique: Vector of counts.

    • unique_count: Counts.

  • s_num_patients_content() returns the same values as s_num_patients().

  • summarize_num_patients() returns a layout object suitable for passing to further layouting functions, or to rtables::build_table(). Adding this function to an rtable layout will add formatted rows containing the statistics from s_num_patients_content() to the table layout.

  • analyze_num_patients() returns a layout object suitable for passing to further layouting functions, or to rtables::build_table(). Adding this function to an rtable layout will add formatted rows containing the statistics from s_num_patients_content() to the table layout.

Details

In general, functions that starts with analyze* are expected to work like rtables::analyze(), while functions that starts with summarize* are based upon rtables::summarize_row_groups(). The latter provides a value for each dividing split in the row and column space, but, being it bound to the fundamental splits, it is repeated by design in every page when pagination is involved.

Functions

  • s_num_patients(): Statistics function which counts the number of unique patients, the corresponding percentage taken with respect to the total number of patients, and the number of non-unique patients.

  • s_num_patients_content(): Statistics function which counts the number of unique patients in a column (variable), the corresponding percentage taken with respect to the total number of patients, and the number of non-unique patients in the column.

  • summarize_num_patients(): Layout-creating function which can take statistics function arguments and additional format arguments. This function is a wrapper for rtables::summarize_row_groups().

  • analyze_num_patients(): Layout-creating function which can take statistics function arguments and additional format arguments. This function is a wrapper for rtables::analyze().

Note

As opposed to summarize_num_patients(), this function does not repeat the produced rows.

Examples 

# Use the statistics function to count number of unique and nonunique patients.
s_num_patients(x = as.character(c(1, 1, 1, 2, 4, NA)), labelstr = "", .N_col = 6L)
#> $unique
#> [1] 3.0 0.5
#> attr(,"label")
#> [1] ""
#> 
#> $nonunique
#> [1] 5
#> attr(,"label")
#> [1] ""
#> 
#> $unique_count
#> [1] 3
#> attr(,"label")
#> [1] " (n)"
#> 
s_num_patients(
  x = as.character(c(1, 1, 1, 2, 4, NA)),
  labelstr = "",
  .N_col = 6L,
  count_by = as.character(c(1, 1, 2, 1, 1, 1))
)
#> $unique
#> [1] 3.0 0.5
#> attr(,"label")
#> [1] ""
#> 
#> $nonunique
#> [1] 4
#> attr(,"label")
#> [1] ""
#> 
#> $unique_count
#> [1] 3
#> attr(,"label")
#> [1] " (n)"
#> 

# Count number of unique and non-unique patients.
df <- data.frame(
  USUBJID = as.character(c(1, 2, 1, 4, NA)),
  EVENT = as.character(c(10, 15, 10, 17, 8))
)
s_num_patients_content(df, .N_col = 5, .var = "USUBJID")
#> $unique
#> [1] 3.0 0.6
#> attr(,"label")
#> [1] ""
#> 
#> $nonunique
#> [1] 4
#> attr(,"label")
#> [1] ""
#> 
#> $unique_count
#> [1] 3
#> attr(,"label")
#> [1] " (n)"
#> 

df_by_event <- data.frame(
  USUBJID = as.character(c(1, 2, 1, 4, NA)),
  EVENT = as.character(c(10, 15, 10, 17, 8))
)
s_num_patients_content(df_by_event, .N_col = 5, .var = "USUBJID")
#> $unique
#> [1] 3.0 0.6
#> attr(,"label")
#> [1] ""
#> 
#> $nonunique
#> [1] 4
#> attr(,"label")
#> [1] ""
#> 
#> $unique_count
#> [1] 3
#> attr(,"label")
#> [1] " (n)"
#> 
s_num_patients_content(df_by_event, .N_col = 5, .var = "USUBJID", count_by = "EVENT")
#> $unique
#> [1] 3.0 0.6
#> attr(,"label")
#> [1] ""
#> 
#> $nonunique
#> [1] 3
#> attr(,"label")
#> [1] ""
#> 
#> $unique_count
#> [1] 3
#> attr(,"label")
#> [1] " (n)"
#> 

df_tmp <- data.frame(
  USUBJID = as.character(c(1, 2, 1, 4, NA, 6, 6, 8, 9)),
  ARM = c("A", "A", "A", "A", "A", "B", "B", "B", "B"),
  AGE = c(10, 15, 10, 17, 8, 11, 11, 19, 17)
)
tbl <- basic_table() %>%
  split_cols_by("ARM") %>%
  add_colcounts() %>%
  analyze_num_patients("USUBJID", .stats = c("unique")) %>%
  build_table(df_tmp)
tbl
#>                                                  A           B    
#>                                                (N=5)       (N=4)  
#> ——————————————————————————————————————————————————————————————————
#> Number of patients with at least one event   3 (60.0%)   3 (75.0%)