requireIsLastEntry: Restrict cohort to last entry per person

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

Restrict cohort to last entry per person

Description

requireIsLastEntry() filters cohort records, keeping only the last cohort entry per person.

Usage

requireIsLastEntry(
  cohort,
  cohortId = NULL,
  name = tableName(cohort),
  .softValidation = TRUE
)

Arguments

cohort	A cohort table in a cdm reference.
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.
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

A cohort table in a cdm reference.

Examples

library(CohortConstructor)
cdm <- mockCohortConstructor()
cdm$cohort1 <- requireIsLastEntry(cdm$cohort1)

CohortConstructor documentation built on June 8, 2025, 12:49 p.m.