===== Add country field in LOCATION table =====
===Proposals are now housed on github===
[[https://github.com/OHDSI/CommonDataModel/issues/91|link to github issue]]


  * Requester: Ajit Londhe
  * Discussion: [[http://forums.ohdsi.org/t/proposal-add-country-field-in-location-table/1168/1|here]].

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=== Proposal ===
The CDM’s Location table includes physical location fields such as street address, state, zip code, and county. However, there is no field for capturing the country of the subjects.

== LOCATION Table ==
The Country field will be based on the ISO's 3166-1 vocabulary (https://www.iso.org/obp/ui/#search), which officially designates 2- and 3-character codes for 249 countries. The alpha-3 set, which uses 3-characters, is the suggested version. Assuming alpha-3, then the Country field would only need to be a nullable varchar(3). 


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=== Use Cases ===
For data sets with patient records originating from multiple countries, there is no way to represent this difference in country; you could not stratify an analysis on country or include country as a covariate. We do not have a real-world use case at this time.