# Quantity

## Run the quantity check

    library(DrugExposureDiagnostics)
    cdm <- mockDrugExposure()
    result <- executeChecks(
      cdm = cdm,
      checks = "quantity"
    )

## Quantity Overall

This shows the quantity of the drug records summarised on ingredient level. The quantity is not a required field, but it is a most useful field. How the quantity is filled depends on the drug strength pattern. For quantified drugs (where the denominator_value is not missing), the quantity identifies the number of packages / items (in case of multiple dose packages). However, in case of non-quantified drugs (where the denominator_value is missing), the quantity identifies the volume / total number of actuations or others dispensed / prescribed.

    DT::datatable(result$drugQuantity,
      rownames = FALSE
    )

Column | Description
--- | ---
ingredient_concept_id | Concept ID of ingredient.
ingredient | Name of drug ingredient.
n_records | Number of records for ingredient concept. If n_records is the same as n_sample this means that there are more records but the number was cut at the pre-specified sample number for efficiency reasons.
n_sample | The pre-specified maximum sample. If n_records is smaller than the sample it means that sampling was ignored because the total number of records was already too small.
n_person | Number of individuals.
minimum_drug_exposure_quantity | Minimum drug exposure quantity.
q05_drug_exposure_quantity | 5th quantile for drug exposure quantity.
q10_drug_exposure_quantity | 10th quantile for drug exposure quantity.
q25_drug_exposure_quantity | 25th quantile for drug exposure quantity.
median_drug_exposure_quantity | Median drug exposure quantity.
q75_drug_exposure_quantity | 75th quantile for drug exposure quantity.
q90_drug_exposure_quantity | 90th quantile for drug exposure quantity.
q95_drug_exposure_quantity | 95th quantile for drug exposure quantity.
maximum_drug_exposure_quantity | Maximum drug exposure quantity.
result_obscured | TRUE if count has been suppressed due to being below the minimum cell count, otherwise FALSE.

## Quantity by concept

This shows the quantity of the drug records on the drug concept level. The quantity is not a required field, but it is a most useful field. How the quantity is filled depends on the drug strength pattern. For quantified drugs (where the denominator_value is not missing), the quantity identifies the number of packages / items (in case of multiple dose packages). However, in case of non-quantified drugs (where the denominator_value is missing), the quantity identifies the volume / total number of actuations or others dispensed / prescribed. The tables are identical to the overall just including two more columns at the beginning.

Column | Description
--- | ---
drug_concept_id | ID of the drug concept.
drug | Name of the drug concept.

    DT::datatable(result$drugQuantityByConcept, rownames = FALSE)