Set cohort start date to the last of a set of column dates

entryAtLastDate() resets cohort end date based on a set of specified column dates. The last date is chosen.

Usage

entryAtLastDate(
  cohort,
  dateColumns,
  cohortId = NULL,
  returnReason = TRUE,
  name = tableName(cohort)
)

Arguments

cohort

A cohort table in a cdm reference.

dateColumns

Character vector indicating date columns in the cohort table to consider.

cohortId

Vector identifying which cohorts to modify (cohort_definition_id or cohort_name). If NULL, all cohorts will be used; otherwise, only the specified cohorts will be modified, and the rest will remain unchanged.

returnReason

If TRUE it will return a column indicating which of the dateColumns was used.

name

Name of the new cohort table created in the cdm object.

Value

The cohort table.

Examples

# \donttest{
library(CohortConstructor)
cdm <- mockCohortConstructor(tables = list(
"cohort" = dplyr::tibble(
  cohort_definition_id = 1,
  subject_id = c(1, 2, 3, 4),
  cohort_start_date = as.Date(c("2000-06-03", "2000-01-01", "2015-01-15", "2000-12-09")),
  cohort_end_date = as.Date(c("2001-09-01", "2001-01-12", "2015-02-15", "2002-12-09")),
  date_1 = as.Date(c("2001-08-01", "2001-01-01", "2015-01-15", "2002-12-09")),
  date_2 = as.Date(c("2001-08-01", NA, "2015-02-14", "2002-12-09"))
)
))
cdm$cohort |> entryAtLastDate(dateColumns = c("date_1", "date_2"))
#> # Source:   table<main.cohort> [?? x 5]
#> # Database: DuckDB v1.1.3 [unknown@Linux 6.8.0-1017-azure:R 4.4.2/:memory:]
#>   cohort_definition_id subject_id cohort_start_date cohort_end_date entry_reason
#>                  <int>      <int> <date>            <date>          <chr>       
#> 1                    1          2 2001-01-01        2001-01-12      date_1      
#> 2                    1          4 2002-12-09        2002-12-09      date_2; dat…
#> 3                    1          1 2001-08-01        2001-09-01      date_2; dat…
#> 4                    1          3 2015-02-14        2015-02-15      date_2      
# }