admiral (version 1.1.1)

derive_var_trtdurd: Derive Total Treatment Duration (Days)

Description

Derives total treatment duration (days) (TRTDURD).

Note: This is a wrapper function for the more generic derive_vars_duration().

Usage

derive_var_trtdurd(dataset, start_date = TRTSDT, end_date = TRTEDT)

Value

The input dataset with TRTDURD added

Arguments

dataset

Input dataset

The variables specified by the start_date and end_date arguments are expected to be in the dataset.

start_date

The start date

A date or date-time object is expected.

Refer to derive_vars_dt() to impute and derive a date from a date character vector to a date object.

Default: TRTSDT

end_date

The end date

A date or date-time object is expected.

Refer to derive_vars_dt() to impute and derive a date from a date character vector to a date object.

Default: TRTEDT

Details

The total treatment duration is derived as the number of days from start to end date plus one.

See Also

derive_vars_duration()

Date/Time Derivation Functions that returns variable appended to dataset: derive_vars_dt(), derive_vars_dtm(), derive_vars_dtm_to_dt(), derive_vars_dtm_to_tm(), derive_vars_duration(), derive_vars_dy()

Examples

library(tibble)
library(lubridate)

data <- tribble(
  ~TRTSDT, ~TRTEDT,
  ymd("2020-01-01"), ymd("2020-02-24")
)

derive_var_trtdurd(data)