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Derive Total Treatment Duration (Days)

Source: R/derive_var_trtdurd.R
derive_var_trtdurd.Rd

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)

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

Value

The input dataset with TRTDURD added

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_dtm_to_dt(), derive_vars_dtm_to_tm(), derive_vars_dtm(), derive_vars_dt(), 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)
#> # A tibble: 1 × 3
#>   TRTSDT     TRTEDT     TRTDURD
#>   <date>     <date>       <dbl>
#> 1 2020-01-01 2020-02-24      55