Documentation
Common Data Model (CDM)
Convert Database to CDM (ETL)
Tool Specific Documentation
Common Data Model (CDM)
Convert Database to CDM (ETL)
Tool Specific Documentation
This is an old revision of the document!
Relevant table: http://www.ohdsi.org/web/wiki/doku.php?id=documentation:cdm:drug_exposure
Field | Required | Type | Description |
---|---|---|---|
drug_exposure_end_date | Yes | date | The 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_supply | No | integer | The number of days of supply of the medication as prescribed. This reflects the intention of the provider for the length of exposure. |
verbatim_end_date | No | date | The 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.
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.