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End of a drug exposure

Proposals are now tracked as github issues

link to issue in github

  • Requester: Klaus Bonadt, Christian Reich, Patrick Ryan
  • Discussion: here.


Relevant table:

drug_exposure_end_dateYesdateThe end date for the current instance of Drug utilization. Depending on different sources, it could be a known or an inferred date and denotes the last day at which the patient was still exposed to drug.
days_supplyNointegerThe number of days of supply of the medication as prescribed. This reflects the intention of the provider for the length of exposure.
verbatim_end_dateNodateThe known end date of a drug exposure as provided by the source.

The verbatim_end_dat field is only necessary as the drug_exposure_end_date becomes mandatory, and might be (wrongly) inferred. In cases where no good data are available to fill that end_date, the ETL will have to take a guess, and that may not satisfy some algorithms for dose calculation.

  • The drug_exposure_end_date denotes the day the drug exposure ended for the patient. This could be that the duration of drug_supply was reached (in which case drug_exposure_end_date = drug_exposure_start_date + days_supply -1), or because the exposure was stopped (medication changed, medication discontinued, etc.)

Use Cases

All standardized analytics and the drug era constructor will only use the drug_exposure_end_date. The days supply could be used to understand the intent of prescribing versus the reality, and it could be used to calculate MPR.

documentation/next_cdm/days_supply.txt · Last modified: 2017/07/06 19:18 by clairblacketer