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

In CohortConstructor: Build and Manipulate Study Cohorts Using a Common Data Model

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

Description

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 = FALSE,
  keepDateColumns = TRUE,
  name = tableName(cohort),
  .softValidation = FALSE
)

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.
keepDateColumns	If TRUE the returned cohort will keep columns in dateColumns.
name	Name of the new cohort table created in the cdm object.
.softValidation	Whether to perform a soft validation of consistency. If set to FALSE four additional checks will be performed: 1) a check that cohort end date is not before cohort start date, 2) a check that there are no missing values in required columns, 3) a check that cohort duration is all within observation period, and 4) that there are no overlapping cohort entries

Value

The cohort table.

Examples

if(isTRUE(omock::isMockDatasetDownloaded("GiBleed"))){
library(CohortConstructor)
library(PatientProfiles)

cdm <- mockCohortConstructor()

cdm$cohort1 <- cdm$cohort1 |>
  addTableIntersectDate(
    tableName = "drug_exposure",
    nameStyle = "prior_drug",
    order = "last",
    window = c(-Inf, 0)
  ) |>
  addPriorObservation(priorObservationType = "date", name = "cohort1")

cdm$cohort1 |>
  entryAtLastDate(dateColumns = c("prior_drug", "prior_observation"))
}

CohortConstructor documentation built on Nov. 5, 2025, 6:53 p.m.