padCohortDate: Set cohort start or cohort end

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

Set cohort start or cohort end

Description

Set cohort start or cohort end

Usage

padCohortDate(
  cohort,
  days,
  cohortDate = "cohort_start_date",
  indexDate = "cohort_start_date",
  collapse = TRUE,
  requireFullContribution = FALSE,
  cohortId = NULL,
  name = tableName(cohort),
  .softValidation = FALSE
)

Arguments

cohort	A cohort table in a cdm reference.
days	Integer with the number of days to add or name of a column (that must be numeric) to add.
cohortDate	'cohort_start_date' or 'cohort_end_date'.
indexDate	Variable in cohort that contains the index date to add.
collapse	Whether to collapse the overlapping records (TRUE) or drop the records that have an ongoing prior record.
requireFullContribution	Whether to require individuals to contribute all required days. If TRUE, those individuals for which adding days would take them out of observation will be dropped. If FALSE, days will only be added up to the day when the individual leaves observation.
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

Cohort table

Examples

library(CohortConstructor)
if(isTRUE(omock::isMockDatasetDownloaded("GiBleed"))){
cdm <- mockCohortConstructor()
cdm$cohort1 |>
  padCohortDate(
    cohortDate = "cohort_end_date",
    indexDate = "cohort_start_date",
    days = 10)
}

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