Merge pull request #153 from OHDSI/themis_110

drug_exposure_start_date population

docs/pages/drug_exposure/drug_exposure.md

@@ -15,6 +15,8 @@ permalink: /drug_exposure.html
 
 | **Field** | **Convention** |
 |:--------|:-------|
+| DRUG_EXPOSURE_START_DATE   | [What date should be used to populate drug_exposure_start_date?](drug_exposure_start_date.html)   |
+|----
 | DRUG_EXPOSURE_END_DATE   | [How to determine drug_exposure_end_date when not given explicitly in the data](drug_end_date_not_in_data.html)   |
 |----
 | DAYS_SUPPLY   | [How to populate days_supply when days supply is missing in the source data](missing_days_supply.html)    |

docs/pages/drug_exposure/drug_exposure_start_date.md

@@ -0,0 +1,46 @@
+---
+title: What date should be used to populate drug_exposure_start_date?
+keywords: drug, drug exposure start date
+last_updated: April 16, 2024
+tags: [drug_exposure, dates]
+sidebar: mydoc_sidebar
+permalink: /drug_exposure_start_date.html
+---
+
+## Issue # and location
+[Themis issue #110](https://github.com/OHDSI/Themis/issues/110)
+
+## Issue summary
+Since drug exposure records may have multiple dates associated, which date should be used as the drug_exposure_start_date?
+
+## Convention type
+Table
+
+## CDM table
+`DRUG_EXPOSURE`
+
+## CDM field
+`drug_exposure_start_date`
+
+## Links to issue discussion
+[CDM Documentation](https://ohdsi.github.io/CommonDataModel/cdm54.html#drug_exposure)   
+
+## Provenance of data
+EHR
+
+## The ratified convention
+- For prescriptions take the date the prescription was filled
+- For administrations take the date the drug administration was recorded
+- For orders take the date the drug was ordered
+
+## Date of ratification/published
+NA
+
+## Downstream implications
+NA
+
+## Link to DQD check
+No
+
+## Related conventions/further information
+NA