Create a drug duration variable

Produces a feature variable that computes the duration of drug exposures (drug_exposure_end_date - drug_exposure_start_date) and aggregates per person using the specified function.

Usage

omop_variable_drug_duration(
  concept_id,
  concept_name = NULL,
  name = NULL,
  agg = c("mean", "sum", "max")
)

Arguments

concept_id

Integer; drug concept ID.

concept_name

Character or NULL; human-readable name.

name

Character or NULL; output column name (auto-generated if NULL).

agg

Character; aggregation function — "mean", "sum", or "max".

Value

An omop_variable object with format = "drug_duration" and a $derived metadata field.

See also

omop_variable, omop.feature.drug_duration

Examples

if (FALSE) { # \dontrun{
recipe <- omop_recipe(
  variables = omop_variable_drug_duration(1124300, concept_name = "Metformin"),
  outputs = omop_output(type = "wide"))
} # }