How to populate days_supply when days supply is missing in the source data

Issue # and location

• Themis issue #125

Issue summary

How should days_supply be populated when it is missing from the source data?

Convention type

Table

CDM table

drug_exposure

CDM field

days_supply

Links to issue discussion

• OHDSI Forums discussion
• THEMIS issue #76

Provenance of data

General

The ratified convention

The field should be left empty if the source data does not contain a verbatim days_supply, and should not be calculated from other fields.

Date of ratification/published

Sept 24, 2021 (CDM v5.4 release date)

Downstream implications

No

Link to DQD check

No

Related conventions/further information

NA